The purpose of the project delivery plan criteria is to reflect the need to consider the input of all the major project stakeholders from the earliest practical stage, to ensure smooth and successful delivery of the project's sustainability objectives.

Project delivery stakeholders therefore include the client, the building occupier or their representative (where known), the design team, the principal contractor and their sub-contractors (where their involvement is deemed necessary by the principal contractor). Concerning contractors’ involvement, it ensures their input in terms of formulating sustainable design solutions, commenting or inputting on the practicality and buildability of (one or more) design solutions and their impact on factors such as programming or cost.

It is recognised that traditionally for some projects, the contractor for the works might not be appointed at the early stages of the project and therefore compliance with some criteria within this issue would not be possible. In these instances, to ensure the aim of the criterion is upheld, a suitably experienced person with substantial construction or contracting experience in projects similar to the proposed works should be involved prior to appointment of the contractor.

A suitably experienced person could be a contractor appointed as a consultant for this stage or a construction project manager.