Manage Material Dependencies#

Material.ManageDependencies

Overview#

This operation allows you to manage the Material Dependencies entities for a certain Material. The Material Dependency is an entity that translates the relation between a certain Material and its predecessors (components), in the sense that the successor cannot begin processing at a certain Step without the required predecessors (components) being themselves present at a certain point in their Flows (typically at the last Step; in other words, the components should have been completely processed at the moment of their attachment to the main Material).

The system implements this restriction in two ways:

1. If the system is working with a Schedule, a restriction that the successor Step (To Step) of the successor Material (To Material), can only be planned for a time after all the predecessors Steps (From Step) of all the predecessor Materials (From Material) have been planned.
2. During Track-in of the successor Material (To Material) at the chosen Step (To Step), the system checks if there any Material Dependencies referencing the pair (To Material, To Step); if so, an error is thrown. Therefore, to remove this obstacle, all the predecessor Materials (From Material) must have previously been Tracked-Out of the predecessor Step (From Step), which automatically closes any Material Dependencies containing that pair (From Material, From Step). This validation is exemplified in the following picture.

Preconditions#

• The From Material and the To Material exist in the system and are Active.
• The From Step and the To Step exist in the system, are Active, and are not Pass-Through Steps.
• The combination of From Material, From Step, To Material, and To Step must be unique.

Sequence of Steps#

The Manage Dependencies Section is accessible from the Material details page.

1. Select the Manage Material Dependencies button.
2. To manage the successor dependencies, that is, dependencies From the current Material go to the FROM tab. To manage predecessor dependencies, that is, To the current Material, go to the TO tab.
3. Add or remove as many dependencies providing for each dependency:
   • The From Material (filled in automatically in the From tab).
   • The From Step.
   • The From Flow Path.
   • The To Material (filled in automatically in the TO tab).
   • The To Step.
   • The To Flow Path.
   • Optionally, define a From Quantity.
   • Optionally, define a From Units applicable to the From Quantity.
   • Optionally, define a To Quantity.
   • Optionally, define a To Units applicable to the To Quantity.
   • Optionally, define a System State - Open or Closed.
   • Optionally, enter a Comment.
4. Select Update to finish the operation.