Product Reliability By Using Design For Six Sigma Essay
This case study demonstrates the increase in product reliability by using design for six sigma (DFSS) and design of experiments (DOE). A medical device company launched a substrate development effort that involved predicting stress and curvature (deformation) caused by the laser welding process to ensure product (that were built using substrates) reliability. By using the process like design and analysis of computer experiments (DACE), the company could predict the stress and warp associated with the laser welding in an electronic welding process on a substrate with varying factor levels. Testing all the factors which effects on Y’s is difficult and time consuming. In order to save time and money, the medical device company used computer simulations rather than creating different samples. So, medical device company decided to approach the problem with six sigma team by using design for six sigma (DFSS). DFSS is also usually called as DMADV (Define, Measure, Analyze, Design and Verify) methodology.
Starting with the define phase, the six sigma team identified the critical parameters (Y’s) based on the customer expectations. First, the team listed out the important Y’s that could be important and among those the team identified the Y’s that are important. Here in this case study, stress and curvature are the critical parameters to develop a substrate.
The team proceeded to the measure phase to identify the uncontrollable factors (X’s)…