Primavera P6 holds the programme — the activities, the logic, the dates the contract demands. It does not know that zone B4 passed factory QC on Tuesday, or that 40 of the 60 panels on Level 12 are installed. Muthari OS knows exactly that, at zone level, because the storekeeper, the QC engineer and the site engineer wrote those records as the work happened. For contractors who fabricate what they install, these are two different jobs, and neither system should pretend to do the other’s.
The programme: activity logic, planned dates, baselines, the delay story the contract will be argued on. Muthari OS carries no planned dates and does not try to. Your planner keeps P6, and the programme stays the programme.
What actually happened, per zone: the drawing revision it was released to, material received and issued, each production stage stamp with actor, role and time, the delivery note it left on, installed quantity recorded daily and capped at the zone quantity, the inspection verdict. None of it is a percentage somebody typed.
When the planner asks where Level 12 is, the answer is not a feeling from the foreman. It is a set of installation entries with names and timestamps, an inspection request with its verdict code, and a stage history that shows how long the zone sat in coating. The number the programme gets updated with has a record behind it.
Registers export to Excel — zone status, installed quantities, the inspection register — and the planner updates P6 from that sheet. That is the whole bridge. There is no integration between the two systems, and we will not describe an export as one.
P6 for time, your ERP for money, Muthari OS for the execution record between them — the system of record for what physically happened to every zone and every batch. Built by contractors in the trade, for companies that run a factory and a site. See also Muthari OS vs a construction ERP.