While new editions of the Contract Management Manual may only be issued every few years, it is important to have a system for continually capturing and recording any lessons learned or responses to new circumstances which might impact on a future edition of the Contract Management Manual. A Lessons Learned Log fulfils this requirement as well as providing a good audit trail for changes to the Contract Management Manual. It can also be used as a mechanism for formally sharing ideas with the Contractor and inviting feedback before amending the Contract Management Manual.