What you need to do
Develop the requirements specification . Ensure that stakeholders and end-users (or their representatives) are involved in the requirements specification. Identify the main risks, including technical risks, in delivering the requirement. Determine in principle who will be best placed to manage risks.
If intellectual property rights (IPR) are an important feature, consider how this will be addressed in the contract.
If the procurement involves software first consider the use of Commercial Off The Shelf (COTS) packages rather than bespoke development.