P6 R8 is the latest release of Oracle Primavera's flagship CPM scheduling software. This product completes the half century and 360° migration from a centralized mainframe to a personal and back to a centralized server.
An owner, with a portfolio of many projects and programs, may choose software and option switches to support its special needs such as continuous (non-interruptible) work assignments and ten hour days, prioritizing for lowest unit cost of production and company standard.
A problem often reported has been that with hundreds of options and switches for tweaking the schedule calculation algorithm, it is unlikely that the contractor and owner P6 software will exactly agree. The question has almost become, "how much divergence is permitted?"
We have previously discussed a trend where contractors prepare and submit a P6 schedule to meet the owner’s spec, but then scheduled work on the site using other means. There is noting wrong with this. The owner gets what it wants – further assurance that the project is progressing and can finish on-time – and the contractor has its own tool to make this happen.
As far as may go claims, that's the possible topic of another post of this blog.