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Production Summary PowerPoint PPT Presentation


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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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Production summary l.jpg

Production Summary

Tony Smith

(Production Coordinator)


Overview l.jpg

Overview

  • Introduction to production process

  • Logistics / yield

  • Delivery Rate

  • Critical path items

  • Risks

  • Issues

  • Summary

Tony Smith – VELO PRR


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Production process

  • Top level view of production process

  • See Talk for process control and QA

Tony Smith – VELO PRR


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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


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Limiting factors in production

  • How many could we make?

Tony Smith – VELO PRR


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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


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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


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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


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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


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Rate

Tony Smith – VELO PRR


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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


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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


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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


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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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