The Terms of Reference (TOR) is a description of the technical work involved in a project, or part of a project. Specifically, it is used to specify the work required by an external consultant, contractor, or supplier.
It is the technical part of the bidding documents.
Typically, a project manager develops a Terms of Reference which is included within the bidding documents for the vendor, and subsequently becomes a part of the contract.
A strong Terms of Reference contains the following information:
This is derived from the project scope statement, and contains two main components:
Schedules are to a project manager like hammers are to a carpenter. If you have a strong scope of work but no timeline to perform it under, you might get excellent work in an unacceptable time line.
Hence, Terms of Reference should have a schedule that details the major milestones. Whether a full gantt chart with completion dates for each and every task, or a listing of a few project milestones, it gives the vendor a firm schedule to perform the work under.
Typically, a simple table itemizing the major project milestones establishes the schedule baseline without micromanaging an external supplier.
Often the work must be coordinated with third parties. These could include utility companies, environmental monitoring agencies, database management firms, or other third party stakeholders that overlap with the project.
It is rare these days that a project does not have some form of overlap with third party stakeholders. Adjacent landowners, end users, or even the general public must be actively managed to ensure they do not trip up the project.
It is easy to identify the major stakeholders that have large power over, or interest in, the project. But it’s usually the minor ones, who aren’t as obvious who trip up a project when they feel they haven’t been consulted.
The Terms of Reference should clearly list the third parties that have an interest in the project, and define what their interest is as much as possible.
Likewise, it is rare these days that a project does not have some form of government regulations that must be adhered to and/or permits obtained.
Government regulatory agencies are not in the business of stopping projects. Rather, they seek to balance the needs of a stakeholder group, for example an environmental activist group, with the needs of the project. Of course, they have the power to rule completely in one direction. But typically they allow projects to proceed under a set of requirements which was determined from consultations with the other side. And these requirements often have cost and schedule implications to the project.
In the same way, almost every industry has standards that have been developed for different types of work. The International Standards Organization (ISO) has developed standards for many things, but most countries have their own standards organizations that have expanded on and adapted the ISO standards, for example the American National Standards Institute (ANSI). In addition, industry specific standards organizations produce highly focused standards, such as the American Society for Testing and Materials (ASTM).
Unless the work is innovative or cutting edge, it is a safe bet that a strong industry-adopted standard can be specified within the Terms of Reference that gives the owner comfort in the quality of work being performed.
Often the vendor requires resources from the owner to complete the work specified within the Terms of Reference. This can include databases, facilities, or access to work sites. It can include past evaluation data for similar work.
This is an area that, in my experience, has some significant room for improvement. Typically, owner organizations possess quite a bit of information that might assist a contractor, but they do not think very hard about what a contractor might need to do their work better or faster. Hence, it doesn’t get passed on to the contractor and the contractor does not ask unless it results in large increases in time or cost. The result is that easy ways to save money are neglected.
In the PMBOK Guide, the Procurement Statement of Work is an output of the Plan Procurement Management process within the Project Procurement Management knowledge area.
The Terms of Reference is identical to this Procurement Statement of Work. The PMBOK Guide prefers the more generic Statement of Work because Terms of Reference is used predominantly in certain industries and very little in others.
It is located within the Project Planning process group, hence it is produced prior to the execution phase of the project.