Printed wire board design to release: An example
Most electronmechanical product companies design/build/assemble and use printed wire boards. The detail required for the design, readiness review, release, and building is shown in the following example of the release of a printed circuit card assembly(CCA). This illustration of the details and interrelationships between organizations and people is a small part of what happens for a rotal top assembly. Figure 3.8a and figure 3.8b show the overview of the CCA design process with review steps. Figure 3.8b shows that the details of the IPDS method with steps in the design and build of a circuit and assembly. The following explains explains the philosophy and the details for each numbered step:
The design center(DC) and producibility engineers will parrner with the CCA center of Excellence(COE) to ensure that the "proof of design"(POD) CCA products are produced and delivered, with the customer's quality, delivery, and cost expectations being met. This partnership covers and embraces "proof of manufacturability"(POM)assemblies when business logistics deem them necessary.
The alliance between the DC, producibility engineers, and COE will result in reduced cost, reduced cycle time, and improved quality. The intent of this arrangement is to complete the majority of production nonrecurring tasks during the POD phase.

Producibility Engineers
The following summarizes additional key roles and responsibilities of CCA producibility engineers:
1, Develop cost and schedule inputs for program proposals.
2,Ensure there is a focus for design services and support capabilities to guarantee that the design development process is followed.
3,Ensure that PWB fabrication and assembly product designs are robust and possess minimum defects with a maximum predicred assembly DPMO goal. Classically the idea of quality was the ability of highly capable processes to

produce output within specification. In particular, process that operate with Six sigma quality produce at defect levels 3.4 defects per(one million opportunities. Six sigma's implicit goal is to improve all processes to that level of quality or better. While this idea is nice, the ability to do doesn't just rest with operation,but with the basic product design. So, after careful planning and producibility efforts, the product team should setinitial quality(DPM)goals and improvement goals to finally achieve 3.4 defects per million opportunities or better. The number is so small that it is perceived as "virtual perfection." The fact that it is not zero allows people to buy into six sigma intellectually. They will probably be willing to strive for three parts per million because it is finite. If executive staff, middle managers, and others and believe this goal it possible and communicate that belief, then this approach has a good chance for sucess.)
4, Ensure that product designs are affordable and meet the customer's cost objective.
5. Ensure that lessons learned are captured and fed back to COE and the design community to assure comtinuous improvement opportunities are documented and the customer is informed.
6. Provide CCA manufacturing a development shop load on a monthly basis. The forecast outlines monthly delivery quantities and estimates future delivery requirements for a 12-month period.
7. Provide CCA manufacturing with an approved component BOM for the purpose of procurement.
8. Determine source selecttion for all POD builds.
9. Develop a statement of work(SOW) for the CCA organization. The SOW outlines total requirements such as quality, in-circuit test requirements, and any other customers, legal, environmental, technical, or manufaturing requirements.