ESG supplier assessment: what it is and why it matters

More and more companies are qualifying and evaluating their suppliers on the basis of compliance with environmental, social, and governance (ESG) sustainability criteria, in addition to the “traditional” requirements aimed at ensuring the quality of supplies, such as technical capability or financial reliability.
This is done by calculating the so-called ESG rating, a score that summarises the supplier’s level of compliance with the three dimensions of sustainability in a single numerical indicator.
Let’s take a look at why ESG compliance is becoming increasingly important for procurement departments and how it can be effectively monitored using Online Procurement’s supplier management and vendor rating systems.
Assessing suppliers for ESG: what it involves
Conducting a sustainability assessment of the supplier base means analyzing and quantifying the existence of specific requirements in 3 main areas:
Quantifying ESG factors requires practical tools and a concerted effort by companies and their suppliers, especially when analyzing complex supply chains that span multiple geographies and/or have a variety of sub-levels.
When and how to assess supplier compliance with ESG criteria

Assigning a sustainability rating to a supplier can take place in two stages:
- At the screening stage, requesting information and documentation as part of the qualification process
- At the contract execution stage, as a reward requirement, through the calculation of dedicated KPIs.
In each of these two stages, it is the supplier himself who enters the required data through questionnaires and checklists, which, once completed, feed into the defined KPIs.
An advanced scoring system also allows requirements to be weighted differently, calculation methods to be fine-tuned, and requirements and required certifications to be diversified by commodity category.
Importance and benefits of supplier sustainability for procurement
Adopting sustainable practices along the supply chain has been on the agenda of procurement departments around the world for several years. This is not just a passing trend: the selection of sustainability-compliant suppliers has a direct impact on business value, as a number of international studies have shown, and offers a number of tangible benefits. Here are the most important:
Suppliers are critical partners in achieving corporate sustainability goals and creating more socially and environmentally responsible products and services. It is therefore essential to engage them early and not leave behind those who are not yet fully ESG-compliant, tiny and medium-sized enterprises, but to develop improvement plans and collaborate with them.