A responsibility matrix sets out who is responsible for each information deliverable and each information management task on a project. ISO 19650 uses two levels: a high-level matrix that assigns deliverables to task teams, and a detailed matrix that names who produces what, at what level of information need, and when. Many projects also keep a matrix for information management functions themselves.
At a glance
| High-level | Detailed | |
|---|---|---|
| Prepared by | The lead appointed party, at tender | The lead appointed party with task teams, after appointment |
| Assigns | Deliverables and responsibilities to task teams | Each information container to an author, with its LOIN and milestone |
| Feeds | The pre-appointment BEP | The TIDPs and MIDP |
| Defined in | ISO 19650-2 | ISO 19650-2 |
Common formats
RACI is a common way to fill the cells:
| Letter | Meaning |
|---|---|
| R | Responsible: does the work |
| A | Accountable: approves it; one per row |
| C | Consulted: gives input before |
| I | Informed: told after |
A matrix for information management tasks might look like:
| Task | Client | Lead designer | Contractor | Task teams |
|---|---|---|---|---|
| Write the EIR | A/R | C | I | I |
| Set up the CDE | A | R | C | I |
| Write the BEP | I | A/R | C | C |
| Produce discipline models | I | A | I | R |
| Run clash coordination | I | A/R | C | C |
| Deliver asset data | A | C | R | R |
What it prevents
- Elements nobody models because each team assumed another would.
- Elements modelled twice by two teams.
- Checks and approvals that nobody performs.
- Disputes later about who should have provided information.
Common mistakes
- Several "A"s in one row, so accountability is shared and nobody holds it.
- Organisations instead of people in the detailed matrix.
- Not updated when the team or scope changes.
- Disconnected from the MIDP, so responsibilities and deliverables drift apart.
Where to read more
ISO 19650-2 describes both matrices in the tender and appointment stages. National guidance gives templates for information management functions.