Machining

Changes that Could Impact Configured Digital Factories

The following changes might impact costing, even for Digital Factories that use earlier cost model versions.

• NO IMPACT

See also Stock Machining.

Bug Fixes or Small Improvements to Prior Cost Model Versions

The following changes might impact costing for Digital Factories that use earlier cost model versions.

• NO IMPACT

Cost Model Changes that don't Affect Configured Digital Factories

The following changes do not affect costings with Digital Factories that use earlier cost model versions. The changes are available only in the latest cost model version.

• Setup Operations (can affect times and costs): In previous releases, aPriori used a weight-based approach to the calculation of setup time, by default (for machines with no offline loading capability). This release it uses a weight-and-size-based approach instead, and accounts for some part setup activities that previously were neglected. As a result, times and costs for setup operations may increase.

  The cost model variable partSetupTimeMethod is now to set weightAndSizeBased in starting point Digital Factories. Times that contribute to setup time are looked up by size (maximum part dimension) and weight in the new lookup table componentLoadTime or are specified by a cost model variable.

  As a result of this enhancement, part setup times generally increase. The impact is greatest for small parts with low overall cycle times. The table below shows how total cycle time estimates change for a set of machined test parts (analyzed in Stock Machining, 2-Model Machining, and process groups with secondary machining). Each row of the table represents a set of parts for which the total cycle times in the previous release fell within a specified range.

  Previous Total Cycle Time Range per Part (s)	Average Difference (s)	Average Difference (%)
  0-100	54	128%
  101-500	58	26%
  501 - 1000	93	13%
  1001 - 5000	68	3%
  5001 - 20000	-13	-0.1%
  >20001	-1084	-2%