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