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Production Summary

Production Summary. Tony Smith (Production Coordinator). Overview. Introduction to production process Logistics / yield Delivery Rate Critical path items Risks Issues Summary . Production process. Top level view of production process See Talk for process control and QA.

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Production Summary

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  1. Production Summary Tony Smith (Production Coordinator)

  2. Overview • Introduction to production process • Logistics / yield • Delivery Rate • Critical path items • Risks • Issues • Summary Tony Smith – VELO PRR

  3. Production process • Top level view of production process • See Talk for process control and QA Tony Smith – VELO PRR

  4. VELO specific • Cash critical • Time critical • These mean component wastage is BAD • See next transparancy • Delicate high value items • Limited prototyping Tony Smith – VELO PRR

  5. Limiting factors in production • How many could we make? Tony Smith – VELO PRR

  6. Comments on yield • Safe on all components • Silicon tight if unexpected breakages occur • Approx 20% loss on silicon accounted for in production • Recommend – purchase of 10 more R&Phi • This would make approximately 50 + modules • Currently cannot release R’s for Veto (6 requested) Tony Smith – VELO PRR

  7. Steady state delivery rate • Gantt chart analysis is dominated by obvious common sense factors • Glue curing • (eg 24 hours for hybrid to paddle ) • Testing times • Bonding times • Burn-in in Vacuum Time • Limited equipment and manpower (e.g. Bonders ) Tony Smith – VELO PRR

  8. Delivery rate – ctd. • Using realistic work weeks and load on equipment and people • Back of envelope 2 per week • Gantt analysis – 2 per week • We have yet to prove this in practice • Most stages have been proven and timed – see Gantt Chart Tony Smith – VELO PRR

  9. Ramping to delivery rate • Rushing things is DANGEROUS • Lost 4 electrical candidate hybrids in weeks to PRR • Need semi-sequential startup (approx 3 modules at 1-2 weeks each). Tony Smith – VELO PRR

  10. Rate Tony Smith – VELO PRR

  11. Critical path to PRR • Prove Sensor-Sensor  • Electrical Modules (~days based on 710) • Base-sensor (2 week) • Vacuum tank qualification(2 weeks) • Improved jigging for handling (2 weeks) Tony Smith – VELO PRR

  12. High risk and impact • Risks with equipment • Follows common sense • Not perfect (PPARC +TJVB algorithm adhoc) • Indicative of expense and risk e.g. cables now as high as sensor delivery • Requires attention • 8090 problem dropping as 710 comes online • Parts and contract for spares evaluated ! low risk or impact Tony Smith – VELO PRR

  13. Issues • Chronic problem we need to resolve • 8090 is a lemon (same device as used by US for CMS production) • Transfer to 710? • Safety of modules • Insist on more handling jigs needed (2 weeks?) • Enforce 2 person module procedures as with sensor testing (onerous) • db entry discipline • Contamination • Cleanliness of the hybrid • Storage and transport • Vacuum distortion needs to be measured Tony Smith – VELO PRR

  14. Summary • Our view is at least 3 weeks from production readiness • Including improving handling • Aim to start up over a month at ~ 1 /week • Transition to 2/week in second month • Increasing risk with cables • 710 qualification likely to offset problems with 8090 Tony Smith – VELO PRR

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