Indicators to compare and assess the institutional strength of voluntary sustainability standards in the global coffee industry

The data presented in this article are related to the research article entitled “The Voluntary Coffee Standard Index (VOCSI). Developing a composite Index to Assess and Compare the Institutional Strength of Mainstream Voluntary Sustainability Standards in the Global Coffee Industry” (Dietz et al., 2018) in press) [1]. The VOCSI presents the most detailed comparison all major voluntary sustainability standards (VSS) that currently exist in global coffee production. This Data in Brief contains the database that we have generated to set up the VOCSI. We publish this dataset in order to facilitate further critical or extended analyzes.


Specifications
Politics, Economics, Law More specific subject area Sustainability Studies, Voluntary Sustainability Standards Type of data

Value of the data
Our database currently presents the most detailed comparison of all major VSS that exist in global coffee production.
It will assist further research on the effectiveness of VSS. Especially, it may serve researchers to better explain impacts related to VSS and to better understand how impact and institutional characteristics are correlated.
The database may also assist consumers and further stakeholders in business, politics and civil society to differentiate between VSS with stronger and weaker institutional designs.
Standard setters may use the database to benchmark and improve their institutional designs.

Data
The following table (Table 1) contains a comprehensive list of regulatory topics related to sustainability transformations in the global coffee sector. The numbers show how strictly each VSS addresses each of these regulatory topics (scale: 0-3).

Experimental design, materials and methods
The creation of this dataset is based on an extensive document analysis of all standard catalogues and attached enforcement documents that the different standard setters have set up (Dietz et al. [1]). For a list of these documents, see Appendix A.

Funding sources
This work was supported by the Land Nordrhein-Westfalen, Ministerium für Innovation, Wissenschaft und Forschung (005-1503-0008) through its financial support of the research group TRANS SUSTAIN. We conducted a survey among 17 highly distinguished experts in order to weigh all regulatory topics according to their relevance for sustainability improvements in global coffee production. We show the list of these experts in Appendix B.

Name
Institution Position E03 Prohibitions against destroying natural ecosystems apart from forest Regulatory elements relating to this regulation: prohibitions against destroying high conservation areas, prohibitions against destroying any natural ecosystem, prohibitions extend to past years.
Definitions Weak: Prohibitions against the destruction of high conservation areas. Medium: Two out of the following three regulatory elements: prohibitions against destroying high conservation areas, prohibitions against destroying any natural ecosystem, prohibitions extend to past years.
Strong: Prohibitions against the destruction of high conservation areas, prohibitions against the destruction of any natural ecosystem, prohibitions extend to past years.
E04 Obligations to protect conservation areas Definitions Weak: Not applicable, no standard scored in this category. Medium: No production occurs in protected areas unless allowed by governmental management plans.
Strong: No production occurs in protected areas (no exceptions). E05 Obligations to establish a canopy cover on farm land ( E14a Obligations to implement pest management practices Regulatory elements relating to this regulation: Knowledge about products used for spraying; monitoring of pest and diseases; use of non-chemical alternatives; justified choice of chemical products; proportionality decisions [max. effectivity vs. minimum toxic impact of agrochemicals).
Definitions Weak: Unspecified steps to build up an Integrated Pest Management. Medium: Integrated Pest Management comprising 3-4 of the mentioned regulatory elements. Strong: Integrated Pest Management comprising all of the mentioned elements. E14b Obligations to train at least 50% of group members/workers on integrated pest management practices The variable is addressed by only three standard-setters by the same rule (this rule is strong by definition).
Definition Strong: Comprehensive trainings on implementing Integrated Pest Management practices (for list of elements: see variable E14a) are provided to at least 50% of group members/workers. E15a Obligations to handle and apply pesticides with care in order to avoid accidents, spills and contamination of the environment Regulatory elements relating to this regulation: Directness of the rule / scope of the rule (Elements: only trained staff handles agrochemicals; preparation and application of agrochemicals according to label and safety instructions; obligations to dispose of surplus agrochemicals in an environmentally friendly way; equipment is in good condition; empty containers need to be rinsed thoroughly and are not allowed to be used for drinking water; environmental friendly disposal of empty pesticides containers; areas for preparing agrochemicals are equipped to handle spills; emergency procedures to deal with spillages).

Definitions
Weak: 2-3 elements. Medium: 2-3 elements, others elements are part of an unspecified management plan. Strong: All or almost elements apply. E15b Obligations to train at least 50% of group members/workers how to handle and apply pesticides in order to avoid accidents, spills and contamination of environment The variable is addressed by only three standard-setters by the same rule (this rule is strong by definition).
Definition Strong: Trainings on all measures (for list of measures see variable E15a) are provided to at least 50% of group members/workers. E16 Obligations to store pesticides safely Regulatory elements relating to this regulation: The farm must store only the amount of agrochemicals necessary to meet short-term needs; these products must be separated according to their biocide, toxicity and chemical formula; they must not be stored on the floor nor come into contact with absorbent materials; a Material Safety Data Sheet must be kept in the storage facility for each chemical product stored; all agrochemical containers must be washed three times before being stored for disposal or return to supplier; all agrochemical containers must maintain their original labels; the farm must take actions to return to the supplier agrochemicals that are prohibited, expired, or not legally registered, or agrochemicals that have had their licenses canceled; if the supplier will not accept them, the farm must seek safe alternatives for eliminating them.
Definitions Weak: Unspecified plans to store agrochemicals. Medium: Some rules on the list regarding storage and storage facilities apply. Strong: All or almost all rules on storage and storage facilities apply. E17 Obligations to restrict the use of fire for pest management The variable is only addressed by one standard-setter (the rules of this standard-setter are strong by definition).
Definition Strong: The use of fire is allowed under restrictions (Restrictions are: fire is the option of less environmental impact, use of fire is approved by competent authorities, focus on problematic areas only).
E18 Obligations to take into account resistance against pest and diseases when choosing new planting material The variable is only addressed by one standard-setter (the rules of this standard-setter are strong by definition).
Definition Strong: Resistance against pest and diseases when choosing new planting material has to be taken into account. Environmentally sustainable soil management E19 Prohibitions against the use of any inorganic fertilizers The variable is addressed by only three standard-setters by the same rule (this rule is strong by definition).
Definition Strong: Strict prohibitions against the use of inorganic fertilizers. E20a Obligations to optimize the use of fertilizers Definitions Weak: Unspecified obligations to receive technical recommendations. Medium: Obligations to optimize the use of organic and inorganic fertilizers according to the nutrient needs of the crop.
Strong: Use of fertilizers is based on a comprehensive fertilizer program including soil analysis. E20b No clear obligations to optimize the use of fertilizers but obligations to provide trainings to at least 50% of group members/workers on how to optimize the use of fertilizers Definitions Weak: Not applicable, no standard scored in this category. Medium: Trainings to fertilize according to the nutrient needs of the crop are provided to at least 50% of group members/workers. Strong: Trainings to fertilize according to the nutrient needs of the crop, trainings on soil analysis are provided to at least 50% of group members/workers. E21 Obligations to use organic fertilizers/natural measures to improve soil fertility Definitions Weak: Unspecified obligations to improve soil fertility. Medium: Implementation of at least one natural measure to improve soil fertility. Strong: Priority needs to be given to organic fertilizers, implementation of comprehensive plan to improve soil fertility by natural measures.
E22a Obligations to avoid soil erosion (e.g. through the use of ground cover) Definitions Weak: Unspecified obligations to avoid soil erosion have been started. Medium: Implementation of a soil erosion plan. Strong: Implementation of a soil erosion plan, plus obligations to use and expand ground cover throughout the farm.
E22b Obligations to train at least 50% of group members/workers how to avoid soil erosion The variable is addressed by only two standard-setters by the same rule (this rule is strong by definition).
Definitions Strong: Trainings on how to use ground cover and how to set up a soil erosion plan are provided to at least 50% of group members/workers. E23 Obligations to establish new production areas based on land use capacity (climatic, soil and topographic conditions must be suitable for intensity level of the agricultural production planned) The variable is addressed by only two standard-setters by the same rule (this rule is strong by definition).
Definition Strong: Land use capacity has to be taken into account when new production areas are established. E24 Prohibitions against burning to prepare land The variable is addressed by only two standard-setters by the same rule (this rule is strong by definition).
Definition Strong: Prohibitions against burning to prepare land. Sustainable water management E25 Prohibitions against discharging unclean wastewater into natural water bodies Definitions Weak: (no output oriented measures) Unspecified obligations not to discharge untreated water directly into water bodies.
Medium: Unspecified rules that wastewater must not have a negative impact on water quality. Medium-strong: Comprehensive water treatment system in place, but no output-oriented measures.
Strong: Comprehensive water treatment system is place, with water analysis and corrective measures.
E26 Prohibitions against using sewage water for irrigation The variable is addressed by only two standard-setters by the same rule (this rule is strong by definition).
Definition Strong: Sewage water must not be used for irrigation. E27 Obligations restricting the use of septic tanks for the treatment of domestic wastewaters The variable is addressed by only one standard-setter (This rule is strong by definition).

Definition
Strong: Septic tanks to the treatment of domestic wastewater is only allowed under tight restrictions.
E28a Obligations to use water in a sustainable way Definitions Weak: Unspecified rules to take some measures to conserve water. Medium: Measures to use water efficiently are in place (best available technologies, water needs are determined, water sources are mapped, used water is documented).
Strong: Measures to use water efficiently are in place, water is harvested from sustainable sources (rain harvesting), water re-circulation systems are in place.
E28b Obligations to provide training to at least 50% of group members/workers on how to use water sustainably The variable is addressed by only two standard-setters by the same rule (this rule is strong by definition).
Definition Strong: Trainings how to use water efficiently take place are provided to at least 50% of group members/workers. Sustainable waste management E29 Obligations to reduce waste Definitions Weak: Organic waste is recycled. Medium: Non-hazardous waste is reused or recycled, organic waste is reused. Strong: Waste management plan is in place for all types of waste. E30 Obligations to dispose of waste in a way that reduces the risks of environmental contamination (e.g. safe waste disposals, prohibitions of burning waste) Definitions Weak: Hazardous waste (only) is safely disposed. Medium: Organic, non-hazardous and hazardous waste is safely disposed, unspecific rules to regulate burning of waste.
Strong: Organic, non-hazardous and hazardous waste are safely disposed, strict rules to regulate burning of waste, restrictions to transfer waste to third persons. Sustainable use of energy E31 Obligations to use energy efficiently There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains obligations to use energy efficiently or not. The existence of such a rule is by definition strong.
Definition Strong: Measures are taken to use energy more efficiently. E32 Obligations to use renewable energy if economically feasible Measure: The variable is addressed by only two standard-setters by the same rule (this rule is strong by definition).
Definition Strong: Usage of renewable energy if economically feasible.

Genetically Modified Organisms (GMOs)
E33a Prohibitions against GMOs There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter prohibits GMOs or not. The existence of such a rule is by definition strong.
Definition Strong: Prohibitions against GMOs. E33b Obligations to communicate the use of GMOs to standard-setting body The variable is addressed by only two standard-setters by the same rule (this rule is strong by definition).
Definition Strong: The use of GMOs has to be communicated to the standard-setting body.

Social standards
Employment conditions S01 Obligations to pay equal or greater than minimum wage Definitions Weak: Not applicable, no standard scored in this category. Medium: Minimum wages (national or industry branch) must be paid. Strong: Payments must increase above minimum wage or living wage must be paid. S02 Obligations to respect wages negotiated in collective bargaining agreements There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: Wages must be paid according to collective bargaining negotiations, if they exist. S03 Obligations to establish a reliable and transparent payment system Regulatory elements relating to this regulation: Regular payment; written pay slip; prohibitions against using wage deductions for disciplinary purposes; prohibitions to ask for money for employment.
Definitions Weak: Only one of the elements. Medium: Two elements. Strong: Three to four elements. S04 Obligations to provide workers with legally binding written contracts Regulatory elements relating to this regulation: regulation includes all workers employed for more than three months / permanent workers only.
Definitions Weak: Not applicable, no standard scored in this category. Medium: Permanent workers. Strong: All workers employed for more than three months. S05 Obligations to allow labor contractors only when they can demonstrate compliance with the requirements of a standard-setter There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: Labor contractors are only allowed when they can demonstrate compliance with the requirements of a standard-setter.
S06 Obligations to take efforts to avoid time-contracts and to employ workers on a permanent basis There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: Where possible the certification holder and the members of its organization must assign all permanent work to regular workers. S07 Obligations to restrict working hours and grant vacation Regulatory elements relating to this regulation: working hours do not exceed 48 h per week; at least one day off after 6 days of work; not more than 12 h overtime per week; breaks at least after 5 h for 30 min; working hours are recorded individually.
Definitions Weak: Not applicable, no standard scored in this category. Medium: None or almost none of the elements is explicitly mentioned but reference is made that working hours comply with national and international conventions.
Strong: All or almost all of the elements apply. S08 Obligations to grant maternity leave Regulatory elements relating to this regulation: 12 weeks of maternity leave; 8 weeks paid maternity leave; right to return to the same position.

Definitions
Weak: Not applicable, no standard scored in this category. Medium: 12 weeks of maternity leave, right to return to same position, but not 8 weeks of payment.
Strong: All elements. S09 Obligations grant decent housing for workers living on-site There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: Workers living on-site have clean and safe living quarters. S10 Obligations to establish day care facilities for children living on the farm The variable is addressed by only two standard-setters by the same rule (this rule is strong by definition).
Definition Strong: Workers living on-site have access to convenient and affordable day care services for their children. S11 Prohibitions against making workers dependent on stores or services operated by the employer The variable is addressed by only two standard-setters by the same rule (this rule is strong by definition).
Definition Strong: Workers are not compelled to make use of stores or services operated by the employer or in connection to the company. Where access to other stores or services is limited or not possible due to location, the employer provides goods and services at fair and reasonable prices. S12 Obligations to guarantee access to education for school age children living on the farm Regulatory elements relating to this regulation: Children must go school; if access to schools cannot be guaranteed under reasonable conditions the farm/group must provide adequate schooling; work does not jeopardize schooling.
Definitions Weak: Measures are taken to implement the above mentioned elements. Medium: Children must go school. Strong: All elements are fulfilled. S13 Obligations to grant farm workers the rights to establish and join worker's organizations (freedom of association and collective bargaining) There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: Workers can freely join worker's organizations without any negative consequences, workers are effectively informed about their rights to establish and join worker's organizations. Non-discrimination S14 Prohibitions against the discrimination of workers All standard-setters contain strict prohibitions of discrimination; exceptions are USDA Organic, EU Organic and Bird Friendly (rule is strict by definition).
Definition Strong: Prohibitions against the discrimination of workers. S15 Prohibitions against corporal punishment, mental or physical coercion and verbal abuse All standard-setters hold that workers are not subject to corporal punishment, sexual harassment, oppression, coercion or any other kind of mental or physical abuse or intimidation at the workplace; exceptions are USDA Organic, EU Organic and Bird Friendly (rule is strong by definition).
Definition Strong: Prohibitions against corporal punishment, mental or physical coercion and verbal abuse. S16 Prohibitions against sexual harassment All standard-setters prohibit sexual harassment; exceptions are USDA Organic, EU Organic and Bird Friendly (rule is strong by definition).
Definition Strong: Prohibitions against sexual harassment. S17 Obligations to train workers There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: Obligations to further qualify workers. S18 Obligations to ensure that women have equal opportunities in the company There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: A program is in place that aims to give women equal opportunities in the company. Freedom from forced labor S19 Prohibitions against forced labor All standard-setters prohibit forced labor (rule is strong by definition). Definition Strong: Prohibitions against forced labor. S20 Prohibitions against requiring spouses to work as a condition of employment There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: It is not allowed to require spouses to work. S21 Prohibitions against hiring minors under the age of 14/15 All standard-setters contain this rule (rule is strong by definition). Definition Strong: Prohibitions against hiring minors under the age of 14/15. S22 Obligations to limit the work of children helping in family farming and family harvesting There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: Children are allowed to help their families on the farm, children are allowed to help their families (employed families) harvesting coffee, work does not interfere with their schooling obligations, work does not exceed two hours per day, work is light.
S23 Obligations to set up remediation policies to ensure that children do no not enter into worse forms of child labor (when no longer allowed to work on the farm according to the standard-setter) There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: Remediation policies are in place to make sure that children do not enter worse forms of child labor.

Community relations (land-use rights)
S24 Obligations to have a legitimate right to land use (prohibition of forced eviction, no land tenure disputes with local population) There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: Farm must either show the appropriate legal document, or it can demonstrate that significant disputes with local communities are absent, there is consensus about land use. Occupational health and safety S25 Obligations to keep workplaces safe Regulatory elements relating to this regulation: warning signs; requirements regarding the design and construction of workplaces: corridors and storage areas on the floor of the storage facilities must be well marked; there must be a free space of at least 30 cm between the wall and the stored materials; the storage facilities must have shelving and platforms for storing equipment made from non-absorbent materials for storing liquid products; there must be enough natural light to allow visibility during the day in the absence of electricity; there must be enough natural ventilation to prevent the accumulation of odors and vapors; the emergency exits must be clearly marked and unobstructed; in the box and packaging assembly areas, the continuous noise level must not exceed 85 dB; the box and packaging assembly areas must have at least two meters of free space for each assigned worker; the farm must have packing material (cardboard boxes, plastic and other materials) storage and assembly areas constructed from impermeable and nonflammable materials.
Definitions Weak: Unspecified plans to install a safety program or requirement of warning sign only. Medium: Clear warning signs, a few (2-3) design and construction requirements are fulfilled. Strong: All elements are fulfilled. S26 Obligations to keep machinery safe There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: Clear obligations that machinery is safe. S27 Obligations to keep spraying equipment in good order Regulatory elements relating to this regulation: spraying equipment is safe, spraying equipment is calibrated.
Definitions Weak: Unspecified requirements regarding the existence of a health and safety system. Medium: One element. Strong: All elements. S28 Obligations to provide drinking water to workers There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition. There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.

Definition
Strong: Regular check-ups are obligatory. S33 Obligations to provide sanitary facilities There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: Obligations to provide appropriate sanitary facilities at workplaces. Economic standards Yield optimization W01 Obligations requiring the management of a cooperative or estate to receive consulting on Good Agricultural Practices (GAP) Definition Weak: Not applicable, no standard scored in this category. Medium: Advice on at least one aspect of GAP. Strong: Comprehensive advice on all aspects of GAP. W02 Obligations requiring coffee producers to implement GAP Regulatory elements relating to this regulation: implementation of procedures to systematically improve soil quality / implementation of GAP in the field of soil improvement; implementation of GAP in the field of harvesting.
Definition Weak: Not applicable, no standard scored in this category. Medium: At least one element. Strong: All elements. W03 Obligations requiring coffee producers to implement good practices for storing, handling and processing coffee The variable is addressed by only two standard-setters by the same rule (this rule is strong by definition).
Definition Strong: Comprehensive obligations to implement good practices for storing, handling and processing coffee.
W04 Obligations requiring the management of a cooperative or estate to invest portions of premiums to increase productivity and quality of coffee production The variable is addressed by only two standard-setters by the same rule (this rule is strong by definition).
Definition Strong: At least 5cts of the Fairtrade premium must be invested in the improvement of productivity and/or quality of Fairtrade coffee. Premiums and financing W05 Obligations requiring coffee buyers to grant a minimum price guarantee to coffee producers The variable is addressed by only two standard-setters by the same rule (this rule is strong by definition).
Definition Strong: Minimum price guarantee exists. W06a Obligations requiring coffee buyers to grant coffee producers premium payments that are regulated by the market There is no variance between the different standard-setters. Therefore, it is only measured whether a standard-setter contains such a rule or not. The existence of such a rule is strong by definition.
Definition Strong: Obligations requiring coffee buyers to grant coffee producers premium payments that are regulated by the market.
W06b Obligations requiring coffee buyers to grant mandatory premiums to coffee producers set by the standard-setting body Applies only to all Fairtrade International and Fair Trade USA standards (the rule is strong by definition).
Definition Strong: Obligations requiring coffee buyers to grant mandatory premiums to coffee producers set by the standard-setting body.
W07 Obligations requiring the management of a cooperative or estate to use premiums according to communal development or work plans approved by an inclusive general assembly Applies only to all Fairtrade International and Fair Trade USA standards (rule is strong by definition).
Definition Strong: Obligations requiring the management of a cooperative or estate to use premiums according to communal development or work plans approved by an inclusive general a ssembly.
W08 Obligations requiring coffee buyers to pre-finance coffee production Applies only to all Fairtrade International standards (rule is strong by definition). Definition Strong: Obligations requiring coffee buyers to pre-finance coffee production.

Smallholder focus
W09 Obligations requiring Voluntary Sustainability Standards (VSS) to certify only selfadministered smallholder producer organizations Applies only to all Fairtrade International standards (rule is strong by definition). Definition Strong: Obligations requiring VSS to certify only self-administered smallholder producer organizations.

Enforcement
Control of producers C01 Obligations requiring the auditor to select a representative farm sample that is subjected to field audits Definitions Weak: Sample calculation represents less than the square root of all farms. Medium: Sample calculation represents the square root of all farms. Strong: Sample calculation represents more than the square root of all farms or square root plus risk analysis.
C02 Obligations requiring the auditor to re-certify certification holders according to predetermined audit cycles (assumption: the shorter the audit cycle the stricter the VSS) Definitions Weak: Three of more years before full re-audit, no external controls in the years between. Medium: Three or more years before full re-audit, less intense external controls in the year between.
Strong: Annual re-audit, or full external audits in the years between. C03 Obligations requiring the auditor to conduct unannounced audits Regulatory elements relating to this regulation: Comprehensiveness of unannounced audits (elements: cost carried by standard-setting program not auditors; unannounced audits for at least 10% of total number of audited units are obligatory; no warning period; selection of the units that receive unannounced audits according to predefined risk criteria not at discretion of auditors).
Definition Weak: Unspecified mentioning that unannounced audits might be possible. Medium: At least two of the elements. Strong: Three or four elements. C04 Obligations requiring the auditor to conduct interviews with workers Regulatory elements relating to this regulation: Precision of the rule / scope of the rule (elements: confidentiality; representative selection of interviewees including workers from different levels and groups; specification of a significant number of interviews, e.g. 50 workers/15 interviews) Definitions Weak: Unspecified mentioning that interviews with workers are part of the auditing process. Medium: At least one element. Strong: More than one element.

Control of auditors
C05 Obligation requiring auditors to be ISO certified All standard setters accept only auditors that are certified by ISO (rule is strong by definition). Definition Strong: Obligation requiring auditors to be ISO certified. C06 Obligations requiring auditors to accept shadow audits though the standard setter (in order to evaluate audit quality) Definition Strong: Obligations requiring auditors to accept shadow audits though the standard setter (in order to evaluate audit quality).
C07a Obligations that standard owned auditor is the only auditor allowed to conduct producer audits Definition Strong: Obligations that standard owned auditor is the only auditor allowed to conduct producer audits.
C07b Obligations that one independent auditor determined by the standard setter must conduct all audits Definition Strong: Obligations that one independent auditor determined by the standard setter must conduct all audits.
C07c Obligations requiring the standard setter to provide a list of independent auditors(coffee producers can choose auditors from this list) Definition Strong: Obligations requiring the standard setter to provide a list of independent auditors. Coffee producers can choose auditors from this list.

Transparency document. Supporting information
Transparency data associated with this article can be found in the online version at https://doi.org/ 10.1016/j.dib.2018.05.048.

Appendix A. Supporting information
Supplementary data associated with this article can be found in the online version at https://doi. org/10.1016/j.dib.2018.05.048.