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Line balancing and detailed timing > Create activities and define roll-up time on operations > Time management

Time categories

You assign one or more time categories to each activity type. These time categories are supported for time analysis:

  • NA – A time category is not assigned. The Category box for the activity is gray.

  • VA – Value-added activities are shown with a green Category box.

  • NVA – Non-value added activities are shown with a red Category box.

  • NVABR – Non-value added but required activities are shown with an orange Category box.

You assign time categories according to business practices. Time categorization affects how time is calculated and shown in reports.

You separate activities into categories so you can determine where time can be minimized for efficiency. For example, you may want to reduce how much time you spend doing non-value added activities such as walking. Below are several examples of value-added and non-value added activities.

Value added Non-value added
Get and dispose part or tool Walk
Position or apply Enter or exit vehicle
Secure Inspect
Assemble or subassemble Track sheet
Route, connect, or clip Scanning

Source: https://docs.sw.siemens.com/en-US/doc/282219420/PL20251212545240207.xid2214895/xid1323657 · retrieved 2026-07-11