Applying Productivity Factors for STO events

PF (Productivity Factors)

The measure of performance (the result of direct effort expended) related to direct tool-time on a STO event is determined by a formula of earned (%) against planned (e) and actual ($). By using PF (Productivity Factors) during DSM (Dynamic Scheduling Methodology) you can simulate performance—using ‘what-if’ scenarios in programs such as MS Project© or Primavera™ P6—to determine the impact on cost and duration.

PF Facts

  • We do not measure productivity. We measure performance.
  • We do not include indirect time when planning (estimating), e.g., permits, meetings, travel, lunch, etc. These will be calculated during scheduling using PF.
  • PF is applied during scheduling against direct, benchmark estimates.
  • PF is different for each phase of a STO event, e.g., open is less efficient than close, for example; the same can be said for difference work types or contractors.
  • The average tool-time on a STO event is 28-35%1. The best you can achieve is 57% given the indirect time (here in-lies the opportunity).


Creating PF Calendars in P6

Using a Level V Project Plan in Primavera™ P6 (Resource Dependent Activities assigned to a Work Order) it’s possible to create various PF Shared Resource Calendars, then assign them globally during DSM ‘what-if’ analysis.

Tip: set the hours/day to correspond with your desired tool-time performance, e.g., 65% for a 2 x 10 shift would be 13 hours out of 24. This would be realistic PF for the opening phase. During the closing phase you can change the PF to 85% given that equipment is cool and clean, studs and nuts are new, and workers are familiarized with the equipment and units, etc.

The key to using PF (Productivity Factors) is to ensure you create them in advance, assign them globally, use DSM, and only estimate direct tool-time hours when developing your PJP’s (Planned Job Packages). And keep in mind that you will actually pay for 10 hours, for example, when you’ll only earn 4-6 hours. If you fail to use PF during scheduling, to optimize your Project Plan, you will either fall behind or have insufficient resources to perform the scope of work.

Note: technology alone will not improve tool-time performance. Only when each stakeholder establishes strategies to support the planning effort, to increase safety, quality and tool-time, in conjunction with DSM and technology, will you maximize tool-time performance.

For training on PF (Productivity Factors) and Primavera™ P6 contact me ( or contact our SEA partner: IPEC Project Systems Sdn. Bhd.

17-04-2015 5-09-17 PM ipec