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  • Users: JosephERG
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  1. JosephERG

    How to determine "statistically valid" sampling plans

    Hi everyone, Good day!!!! Just want to ask if you could provide me some procedures on how to determine sampling plans. As of now, we perform sampling inspection in our production line but we have no basis whether or not the chosen sampling plan is statistically valid. We just choose...
  2. JosephERG

    Measuring Quality Performance of a Jobshop production

    Thanks tomwalz...... How I wish I had the same opportunity as you had. By the way, I'd like to know (if you don't mind) if your'e also into "process capability" (CpK, Cpu) or SPC in your shop floor. We haven't really applied any statistical controls on our processes (especially machining)...
  3. JosephERG

    Measuring Quality Performance of a Jobshop production

    Thanks guys for the advise. By the way tomwalz, is it OK if you share those machining websites you mentioned? I'd like to check it out.
  4. JosephERG

    Measuring Quality Performance of a Jobshop production

    Thanks guys for the valuable insights..... I agree with what tygerdawg said about the mismatch between our "numbers" and our actual performance. We failed to recognize that what was "good numbers" for us may not necessarily mean "good" for our customers. Actually, I am focusing more on...
  5. JosephERG

    Measuring Quality Performance of a Jobshop production

    Hi Everyone, Good Day!!! I would like to ask advise from you guys (especially from the "jobshop people") regarding the best method for measuring quality performance of a jobshop production. As of now, we are using the yield, %rejects, abnormal lots, and returned lots as our metrics for...
  6. JosephERG

    Yield Monitoring

    Thank you very much Mike for the valuable insights.....
  7. JosephERG

    Yield Monitoring

    Hello Mike, Good Day!!! Everything that you said applies in our organization as well. I also believe that quality is more than just continuous improvement, it is "innate exellence". However, management doesn't wanna listen to that. They always demand figures. Do you use any quality metrics...
  8. JosephERG

    Yield Monitoring

    Hello Mike, Good Day!!!! That is actually my dilemma right now. Due to the small size of our lots, it is almost inevitable that our target yield should be 100% for each process even though the average yield (within 6 months) is lesser. I believe that there is a better way of monitoring the...
  9. JosephERG

    Yield Monitoring

    Hi All, Good day!!!!! I would like to inquire, especially for those in a job-shop business, if you can share some tips on how to monitor process yields. In our company, process yields are determined by getting the average yield for each process (of a particular product type), within a 6-month...
  10. JosephERG

    How to determine target yields

    Hello Triple Z, Thank you very much for your valuable insights. We do manufacture 50-70 parts(more or less) annually, but this is only for one product type. We manufacture several product types (each of them is distinct from one another), but in small quantities. If we talk about the total...
  11. JosephERG

    How to determine target yields

    Hello tripleZ, Thank you very much for the valuable information. I would just like to clarify something. Is this "preset number" based from historical data or from actual process study? In our case, the order qty of the products we manufacture ranges only from 3 to 10 pieces. It is very rare...
  12. JosephERG

    How to determine target yields

    Hi All, I would like to inquire if any of you guys, especially those in the fabrication business, can provide information on how to determine the "target yield". In our company, QC engineers are required to set the target yield for each process involved in the manufacture of our products...
  13. JosephERG

    production planning & control for fabrication business

    Thank you guys for the valuable insights. Its good to know that we are not the only one experiencing this difficulty. Our company is engaged in the manufacture of precision tools used for semi-conductor processes (i.e. die bonding, wire bonding, etc.). Our customers are mostly from Japan and...
  14. JosephERG

    production planning & control for fabrication business

    Good Day!!! I would like to seek advise about the best production planning and control system for a fabrication type of production. Currently, our company is using the "process yield" as basis for production planning. I think that this approach is more applicable for mass production type of...
  15. JosephERG

    About surface roughness

    Thank you very much guys!!!!! I'll check on these links!!!!! JosephERG
  16. JosephERG

    Improvement of assembly method for push-up pins

    Hi guys!!!!! Is there anyone of you guys who happens to have an experience on assembling push-up pins? Push-up pins, by the way, is a tool used to remove chips (in an upward direction) from the wafer before it is wire-bonded. This tool is very common in the semi-conductor industry and our...
  17. JosephERG

    corrective actions for non-conforming products

    Thanks ck1999!!!! Is this CA team of yours composed of the heads of each group (QA, maintenance & production)? Or just a representative from each? Which do you think is better? Thanks. JosephERG
  18. JosephERG

    corrective actions for non-conforming products

    Hi All!!! I would just like to ask who formulates the corrective action/s for every non-conforming products that are transferred to QC? As a rule, we all know that the production group has to ensure that all devices transferred to QC must have no "rejects" that is why they perform 100%...
  19. JosephERG

    maintenance/calibration of thread gauges

    Hi All, Recently, we have received complaints from our customer that the thread condition of our dispensing tools are NO GOOD. Meaning, it doesn't fit into their standard thread gauge when inserted. FYI, my company and our customer uses the same inspection tool (the same brand as well). Just a...
  20. JosephERG

    About surface roughness

    Hi All, Do anyone of you guys know how to improve the surface quality (roughness) of inside surfaces specifically for stainless steel tubes with inside diameters as small as 0.41 to 0.55 mm? Our team is currently developing a dispensing tool that has low friction properties. Therefore...

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