1. Demand Flow Manufacturing Implementation Guide
  2. Understanding Total Product Cycle Time Calculations

Understanding Total Product Cycle Time Calculations

After you have created the line design, you can calculate total product cycle time (TPc/t) for an item, using the Calculate Total Product Cycle Time by Line Design program (PF30L920). TPc/t is the calculated work content time through the longest path of the product synchronization that is required to build a product. TPc/t is typically less than the total work content time that you need to build the entire product. You have three options to determine which type of work content that the system uses to calculate TPc/t:

  • Actual time entered on the process map.

  • Work content from the sequence of events.

  • Design selection on the process map.

The system calculates total product cycle time for one product at a time based on a line and line design, using the critical path algorithm. The calculation is based on the following rules:

  • The static quantity is not used in the calculation.

  • The calculation uses the longest of the overlapping times for overlapping sequences.

  • For tasks that are standard tasks, the TPc/t calculation multiplies the time to complete one sequence by the number of times the task is to be repeated.

  • The calculation begins at the end-of-line process and moves backwards through the product synchronization, searching for the longest accumulated work content time.

  • The work content time that is counted for each process is the time from the last sequence back to the point at which a feeder process is consumed.

After you calculate TPc/t, the Define Total Product Cycle Time form displays the processes that occur on the critical path along with their times and the paths on which they occur.

If the selected work content source identifies value-added and non-valued added work, the TPc/t calculation calculates and displays these values separately. It also calculates the percentage of value-added or required work.

The system does not perform the TPc/t calculation when the selected work content sources do not contain any time information. In this case, the system issues an error message.

Note: When calculating total product cycle time, the system updates the FF30L501 table if the primary line that is defined in the FF30L501 table matches the item in the line design.

When you run the calculation, the system populates the Total Product Cycle Time and Primary Line fields in the DFM Item Master program (PF30L501). You can export the item record with the updated total product cycle time and primary line back to the JD Edwards EnterpriseOne inventory tables by running the DFM Export Item Branch program (RF30L501E).

See Understanding Data Export from JD Edwards EnterpriseOne Demand Flow Manufacturing.