| Capability | Workability | Do you have a catalogue of criteria? | Sönnichsen and Clement, 2020 |
| Integration | What do you use as a guide when registering requirements/ selecting bidders/approving budgets? | Walker et al., 2008; Sönnichsen and Clement, 2020; |
| Potential | Individual intentions | What drives you towards GPP? | Walker et al., 2008; Bals et al., 2019 |
| What opportunities do you see in sourcing sustainable cleaning products? |
| Shared commitment | Do you develop GPP in cooperation with other departments? | Behravesh et al., 2022 |
| Capacity | Social norms | Do you feel that ecological sustainability is anchored in your organizational culture? | Sönnichsen and Clement, 2020 |
| In your opinion, how can GPP be defined? |
| What are the components? |
| How do you think environmental sustainability could be anchored in the organization? |
| Do you have a specific procurement strategy? |
| Have you taken ecological aspects into account? |
| For which supplies/services do you think GPP is particularly worthwhile? |
| Social roles | Does your organization have a specialist for sustainability issues? | Bals et al., 2019 |
| Material resources | What might be holding you back from implementing GPP? | Walker et al. 2008; |
| What difficulties do you see in the GPP of cleaning products? |
| Cognitive resources | Where do you get your expertise on GPP from? | UNEP, 2022; Sönnichsen and Clement, 2020 |
| Have you received training or further education on this topic? |
| Do you consult external specialists? |
| Contribution | Coherence/sense-making | How do you implement ecological aspects? | Igarashi et al., 2015 |
| Collective action | Do you use instruments for market observation, research or analyses? | Appolloni et al. 2014; Igarashi et al., 2015; UNEP, 2022; Sönnichsen and Clement, 2020 |
| If so, which ones and how? |
| What do you use as a guide when registering requirements/ selecting bidders/ approving budgets? |
| Do ecolabels/certificates etc. play an important role? |
| What are your GPP criteria? |
| Do ecolabels/certificates etc. play an important role? |
| Do you calculate life cycle costs? |
| At what stage of the process (bidder eligibility, contract award, contract negotiation) do you incorporate environmental aspects and how do you enforce them? |
| How did you go about anchoring ecological aspects in the awarding of contracts? |
| Cognitive participation | How have you been able to overcome previous difficulties? | Walker et al., 2008; UNEP, 2022; Bals et al., 2019 |
| Have you planned any future changes to the process? |
| What do these look like? |
| How do you think the topic of GPP will develop in the future? |
| Which topics do you think will become more important concerning GPP? |
| Reflexive monitoring | Do you check compliance with environmental criteria after the contract is signed? | Appolloni et al.. 2014; Bals et al.. 2019; Sönnichsen and Clement, 2020 |
| Do you monitor the impact of your GPP on environmental performance? |
| What exactly do you measure and how? |
| Do you also measure the environmental performance of your suppliers? |
| Do you measure the impact of your sustainability activities on the financial performance of your organization? |
| What exactly do you measure and how often do you measure progress? |
| Institutional setting | Do you feel that you work closely with your suppliers? | Behravesh et al., 2022; Vörösmarty and Tátrai, 2019 |
| Do you think close cooperation with suppliers could promote environmentally sustainable procurement? |
| What information do you share with your suppliers and how do you share it? |
| What role does trust play in sustainable supply chains? |