Hello Stork
If the process has been running for years:
- what is your internal scrap or rework which is "supposed" to be due to inspection inconsistencies of operatoprs, if you have such a data
- what is your process variation history in terms of yields, first pass and after rework
- what is your external DPM, and do you have customer complaints
Some of the answers to above questions may support the idea that there is no need for an MSA study(just my opinion, in some cases the performance data history may be used as "process validation"
If you or your boss wants to run an MSA, the he/she should help in organizing this.
You may collect those 10 part production once, run on them a standard inspection by the most skilled person, this will be the standard, then take the operators for each shift together for one day, and run the study.
In my opinion, you can run the study on a different product, it will still give a good reference let say 70-80% about the operatrs skill and performance.
Just my opinion.
Good luck
György