Automatic Line Balancing Using Pinned Operations

You can lock operations in their initial system to prevent them being moved during Automatic Line Balancing. You lock operations using the Pin Operation contextual command, and unlock them using the Unpin Operation contextual command.

The behavior of pinned operations during Automatic Line Balancing is as follows:

When the initial and target systems have a common parent system, only the initial system's unpinned operations are moved to the target system. The initial system's pinned operations do not move.
When the initial and target systems do not have a common parent system, all the initial system's pinned and unpinned operations are re-instantiated in the target system.

This task shows you how to:

Balance Operations in a Common Parent System
Balance Operations in a Non-Common Parent System

Balance Operations in a Common Parent System

When the initial and target systems have a common parent system, you can move the initial system's unpinned operations to the target system.

Open a system structure comprising an initial system and a target system, both under a common parent system.
In the system structure:
1. Right-click operation Op 3 in the initial system, then select Pin Operation.
2. Right-click operation Balanced Op 2 in the target system, then select Pin Operation.
A pin symbol appears on these operations to indicate that they are locked.
From the Authoring section of the action bar, click Automatic Line Balancing .
The Automatic Line Balancing dialog box appears.
Select the initial system and the target system.
Optional: To remove all existing operations from the target system before balancing afresh, select the Delete balanced operations under target system option.
Notes:
- This option is useful to bypass unsolvable constraints for rebalancing.
- This option is ignored if the initial system and target system are the same.
Click Generate.
The pinned operations Op 3 and Balanced Op 2 do not move, and the other operations are balanced on the subsystems of the target system.

Balance Operations in a Non-Common Parent System

When the initial and target systems do not have a common parent system, you can re-instantiate all the initial system's pinned and unpinned operations in the target system.

Open a system structure comprising an initial system and a target system that do not have a common parent system.
In the system structure:
1. Right-click operation Op 3 in the initial system, then select Pin Operation.
2. Right-click operations T Op 7 and T Op 9 in the target system, then select Pin Operation.
A pin symbol appears on these operations to indicate that they are locked.
From the Authoring section of the action bar, click Automatic Line Balancing .
The Automatic Line Balancing dialog box appears.
Select the initial system and target system.
Optional: To remove all existing operations from the target system before balancing afresh, select the Delete balanced operations under target system option.
Notes:
- This option is useful to bypass unsolvable constraints for rebalancing.
- This option is ignored if the initial system and target system are the same.
Click Generate.
Operations T Op 7 and T Op 9 do not move in the target system. A new operation Op 3 is instantiated in the target system and is not pinned. The initial system is unchanged because it is in another root system.