Works Information

NEC Works Information is the NEC3 term for the documents and instructions that describe the works and set constraints on how they are built. NEC4 renamed it the Scope. If your contract is NEC3, this is still the right term, and many long-running projects continue to use it.

The definition is at clause 11.2(19) of the NEC3 ECC. It has two tests: what the information does, and where it lives. If either fails, it isn't Works Information, however official it looks. This page is part of the NEC definitions glossary, and the comparison with the Scope covers the switch between editions.

The two tests

Test	What qualifies
What it does	It specifies and describes the works, or it states a constraint on how the Contractor provides them
Where it lives	In the documents the Contract Data names, or in an instruction given under the contract

Test cases on an NEC3 job

Item	Works Information?	Why
Drawing named in the Contract Data	Yes	Meets both tests
Later drawing issued with a Project Manager's instruction under 14.3	Yes	In an instruction, and it describes the works
Drawing revision shared on a project portal, with no instruction	No	Fails the second test
A constraint on working hours in the preliminaries named in the Contract Data	Yes	It's a stated constraint, and in a named document
A constraint raised in meeting minutes	No, unless an instruction follows	Minutes aren't normally an instruction
A borehole log in the Site Information	No	Describes the Site, not the works

Where it matters in NEC3

• Contractor's duty: providing the works in line with it, at 20.1.
• Compensation events: a change is an event under 60.1(1), with the exceptions in that clause.
• Defects: the first limb of the Defect definition measures work against it.
• Illegal or impossible requirements: clause 18.1 in NEC3.
• Ambiguity: clause 17.1, with assessment under 63.8 favouring the Party that didn't provide the Works Information.
• Accepting Defects: under 44.2 in NEC3, the Works Information changes so the Defect doesn't have to be corrected.

A worked example

A fictional NEC3 Option A job. The architect uploads revision C of a stair drawing to the portal, changing the handrail from painted steel to stainless. The Contractor's site team sees it and builds to it. Three months later, the Contractor notifies a compensation event for the extra cost. The Project Manager says no instruction was given and it's just the Contractor's interpretation of a drawing.

Both sides have a problem. The contract's route for a change is the Project Manager's instruction. A drawing revision on a portal may not qualify, and its status is unclear. The Contractor also needs to check when it became aware of the event, as the time bar in clause 61.3 may matter. On the other side, the Project Manager should have spotted the discrepancy.

The practical fix is routine: any new revision that changes the Works Information goes out by the Project Manager's instruction, with its own reference, and the Contractor doesn't build from anything else. If it's unsure, the Contractor raises it early.

If you're updating templates

• Don't do a simple find-and-replace to NEC4. Other terms moved too, for example Employer became Client, and clause numbers shifted.
• Don't use the word "Scope" in NEC3 letters as a loose synonym. An NEC3 contract doesn't define it.
• Check the Contract Data form: the NEC3 entry refers to the documents containing Works Information, and any part two entry for the Contractor's own design.
• Review Z clauses, since they often refer to the old term and need changing with it.

Keep the terms straight, and make sure any new starter on the job knows which edition applies. See what NEC3 is for the broader picture.

Related guides

• NEC Definitions: A Glossary of Key Terms
• Clause 10: Mutual Trust and Co-operation
• Clause 13: Communications
• Clause 14: Project Manager and Supervisor
• The Works
• Working Areas

This guide is general information in our own words, not legal advice. Your contract and its Contract Data always govern. NEC, NEC3 and NEC4 are trade marks of Thomas Telford Ltd; Contract Status is not affiliated with or endorsed by NEC.