The Producibility Assessment Worksheets (PAWs) are
documentation of expert opinions on specific topics gathered from questionnaires
or other non face-to-face means. They can be used to help an Integrated Product
Team (IPT) identify problem areas that may be difficult to initially define.
PAWs are structured to provide an easy means to identify these problem areas and
help the IPT develop the course of action needed for resolution.
The PAW is an excellent example of a trade study tool.
The PAW, which was presented in the 1993 "Producibility Measurement Guidelines,"
assigns numerical values for each process element. When averaged, these indicate
a measure of the probability of successful production. The producibility index
is predicated on subjective data, or information based on the evaluator's past
experience with the product or similar product. The worksheet is, therefore,
beneficial in a product's development stage because it is designed to
communicate an evaluator's knowledge, experience, and expert judgment. The
worksheet also accounts for what the evaluator knows about the product's design,
as well as what resources may be used in production. This information is then
shared with other members of the IPT to determine the likelihood of a product's
The basis of the PAW is the Delphi Technique. It is used
as a means to compile the anonymous response of experts on the issues listed on
the worksheet and as a tool to identify possible problems that might be
encountered in manufacturing. The PAW is based on:
- Anonymous Response: Normally effected through the use of questionnaire, on-line
computers, or other non face-to-face means. The IPT, however, can use both
anonymous and face-to-face means.
- Interaction and Controlled Feedback: Conducted through a series of rounds between which a
summary of the previous rounds results are communicated. If the assessments
are initially completed anonymously, open discussions and feedback should
occur after the IPT has collected the assessments.
- Statistical Group Response: After discussions, the IPT should have a good assessment as
to the producibility of the part as designed.
The worksheets are simple, easy to use, and flexible
enough to fit any manufacturer's individual needs or situation. PAWs have been
developed for Source Selection, Circuit Card Assembly, Electrical, Mechanical,
and Management. Figure F.4
is representative of the PAW methodology. Other PAWs
can be developed to meet a company's needs. PAWs can be used for one single
component or for a complete system. If needed, multiple PAWs can be used to
yield a producibility measurement.