Informal workers often suffer from a lack of organization and representation and for this reason are more likely to have less advantages conditions in negotiating terms of exchange, selling their production and expand their businesses.
This document is a promotional leaflet by The LAB, which is "an ILO global project that aims to advance practitioner understanding about how to measure and maximise jobs impact through value chain development." If this sounds interesting, perhaps you can reach out to them.
This document, as the title indicates, acts as a general handbook in creating employment and improve working conditions in the areas that a project targets. It focuses exclusively on the importance of developing value chains when working to improve the quality of life of beneficiaries.