A scope matrix from the specification divisions: every obligation assigned to a package
Buyout begins with one folder of quotes and a specification index. Three buyers assume another package includes the roof hatch. A mechanical-screen detail has louvres on the drawings, but no quote names who supplies and installs them.
List the obligations found in the specifications and drawings, then assign each defined obligation to a responsible package. Use specification sections as the starting index, splitting a section into separate rows when several packages perform different parts. A single section heading is not always a complete trade boundary. The matrix is the shared allocation table that quote comparisons and package scopes read from; it does not replace those agreed documents.
Turn the document index into assigned work
- Gather the current basis. Identify the issued specification, drawing revisions and relevant addenda. Put their references on the matrix. Include the contractor's own crews as a package so self-performed work does not vanish from the allocation.
- Create rows for identifiable obligations. Start from each applicable section, then add drawing-only items. Split supply, installation or interface responsibilities where they belong to different packages. Give each split a clear description and document reference rather than copying a broad heading.
- Mark a responsible package for each row. Confirm the proposed assignment with the buyer and affected trades. Keep uncertain assignments open. A coordinating lead may be useful, but naming that lead does not allocate another trade's actual work automatically.
- Show the boundary beside the assignment. Record what one package hands to the next, including associated preparation, connection or protection where specified. Cross-reference the relevant scope draft. A row should be understandable without relying on the person who coloured the cell.
- Review empty and overlapping rows. Ask the affected buyers to compare their quotes and proposed scopes. Resolve who carries the obligation and how its price is treated. Do not remove an overlap merely to make the matrix appear complete.
- Reconcile before the relevant award. Carry accepted assignments into the package documents and retain open decisions with owners and dates. Issue one dated matrix for buyout and update it when a confirmed scope change affects the boundaries.
Common mistakes
- Treating a specification heading as proof that one trade owns everything beneath it.
- Using a colour mark with no defined obligation or scope reference.
- Resolving a gap in the table but leaving the issued package unchanged.
Checklist
Before relying on the matrix
- Current document basis named.
- Mixed obligations split clearly.
- Drawing-only items included.
- Own crews shown as a package.
- Open assignments and overlaps have owners.
- Agreed package scopes match the table.
Check your understanding
A specification section includes work split between two packages. Should you mark only one trade to keep the matrix simple?
