Hi Harsh
As I look at your problem, I understand that your process defects are ‘Scraps’ and cause for the defect to occur is a ‘mis-run’ and factors or root causes for the cause or ‘mis-run’ to occur could be the variations in process parameters. Correct me if my understanding is incorrect.
I see you’ve listed many parameters that would have influence over ‘mis-run’. When you’ve prepared this list, i’m sure you would have good knowledge over the process as well. Therefore, before jumping into statistical tools, sit down and do a logical analysis of what could be the effect of each those parameters on your process performance based on your technical knowledge. Think about what can really go wrong and to what extent in each of those parameters based on your current process controls and instruments (system design). This would help screen those insignificant factors. If you do this exercise with real interest, most likely you would identify the root cause for your problem. If you still have not found it, then go for a statistical tool to understand better the relationship between your process parameters and output.
regards
VP
