Developing a conceptual model has different ways. Here developing a model fro Supply chain process that should be Sustainable by using information sharing technologies
First of all find factors sub factors and KPI for sustainable supply chain (SSC) and three main factors i.e., triple bottom line, Social, Economic and Environmental foactors are aessental part of SSC.
You can take following paper as start point
Performance Measurement: A Conceptual Framework for Supply Chain Practices
If I understand well, a part of your project is identifying the contribution of information sharing to improve supply chain sustainability.
I second Rai in the sustainable supply chain concept.
Information sharing from the customer back to the first player of the value chain can decrease the wastes significantly. There is a competition between suppliers at the different levels of the supply chain, and sometimes they are focusing o attributes what are valueless for the customer instead of the significant ones. It can result in over-packaging or attributes cause more substantial environmental burden and not valued by anybody in the value chain.
The expected and valued credence attribute should be applied across the supply chain to generate value and higher margins. Also, the information has to flow toward the final user to realize the benefits of the sustainable production.