Contractual requirement must be quantifiable and measurable; otherwise there is a risk that it may be unenforceable. The buyer must also consider whether this requirement is core to the contract or a secondary issue, as any remedy for breach of performance may be difficult to quantify.
At the point of potential award there is always scope to reach a voluntary agreement with the supplier that they will work with you to deliver identified (and agreed) sustainable outcomes that can be captured as a contract commitment. Ongoing improvement and innovation can also be built into the management of the contract to further develop the products and services required.
