MFG/PRO 9.0 User Guide Volume 3: Manufacturing - QAD.com

18 MFG/PRO USER GUIDE — MANUFACTURING
Ï See User Guide
Volume 6: Master
Files for more
information on
PCC.
Ï See “Engineering
Effectivity” on
page 23.
Tip
A relationship is
effective through
the end date and
becomes obsolete
the next day.
the same parent and same reference as long as the start dates are
different.
Note If you use the Product Change Control (PCC) module, engineering
change notice functions in Product Structures are disabled.
Since the system uses product structures to store configuration bills,
you can also enter the feature code for configured products in
Reference.
Start and End Effective. The way an item is manufactured can change
over time. New components can be added or unnecessary ones
deleted. Use effective dates used to store relationships for historical,
current, and future product structures.
All parent-component relationships are identified by a start and an
end effective date. The start and end effective dates indicate the time
period a relationship is active.
Example The hinges and fasteners for a frame are being upgraded. The
obsolescent components have an end effective date of March 14, and the
new components have a start date of March 15. If an adhesive is added to
prevent the screws from coming loose, then the product structure can be
recorded with the start date when it became effective.
Scrap. Depending on the product, some components may be lost or
unusable as a result of the manufacturing process. There are two ways
to anticipate this loss.
• Use the scrap factor
• Change the component quantity per
The scrap factor is the percentage of a component expected to be lost
during manufacturing. The system uses this with the quantity per to
calculate component requirements for work orders and MRP. When a
scrap factor is used, component quantities are almost always extended
into fractional amounts and not whole units, making it difficult to use
on items always handled in discrete quantities.
Example One left lens is required for a pair of sunglasses and the scrap
factor is 5%. The system calculates a requirement for 105.2631 left lenses
to make 100 sunglasses.
Using scrap percentages other than zero promotes waste and can
conceal quality problems. If additional quantities are consistently