Minutes of the Tracker Technical Meeting,
January 9, 2003
Agenda:
1.
Project schedule issues (see Althouse's note below)
2. Mini-tower schedule:
Week of January
20: practice ladder/MCM integration at G&A with a dummy tray.
Week of January
27: glue ladders, attach MCMs, and wire bond at G&A (2 weeks).
Week of February
10: test the completed trays in Pisa.
Week of February
24: ship the completed trays to SLAC.
Week of March 3:
assemble the mini-tower at SLAC and test.
March 10:
deliver to I&T.
3.
Bias circuit insulation problem
4.
Status of work at G&A (ladder production, encapsulation. . .)
5.
Status of the second ladder assembly line (MIPOT)
6.
EM MCM status
7.
Mechanical design status; detailed bottom tray FEA model
8.
Test plan for CC testing
9.
Sidewall procurement
10.
CDR Preparations (only about 2 months to go!!):
-
we need complete plans/procedures AT LEAST in draft form for each process:
*
ladder production (done)
*
ASIC testing, MCM assembly and test, MCM burn-in
*
tray panel assembly
*
tray integration
*
tray acceptance and qualification testing
*
tower assembly and test
*
tower shipping
-
all drawings need to be complete and released
-
spares plan, requirements and ICDs released, etc., etc.
-
test results documented
11.
A.O.B.
Action Items:
1.
Sandro: complete the plan for flight tray panel fabrication after the first EM
trays are done.
2.
BJ: send Sandro the assembly drawings for the top-tray assembly tooling.
3.
Put the MCM identification numbers on the invoice and the black boxes when
shipping to Pisa.
4.
Tom: purchase 500g of encapsulation materials for MIPOT.
5.
Tom: find when Teledyne will be ready for us to test the remaining MCMs.
6.
Tom: complete a draft plan for the CC material testing.
7.
Sandro: discuss the proposed sidewall procurement swap with Ronaldo.
8.
Robert: send out the updated procurements list (attached)
Robert discussed the schedule issues and
emphasized that the Tracker group must commit to catching up on the schedule by
the end of the fiscal year. This means
that we must stay on top of getting the flight procurements and productions
going on schedule in the next few months.
To start with, the CC material is arriving on time, and the ASICs have
been ordered within about a week of being on time. The biggest problems will be dealing with this while in parallel
completing the paperwork needed for CDR (and the procurements) and completing
the fabrication and test of the engineering model. Below is included the project manager's comments on the schedule
problems and what we need to do.
Sandro said that he can present a more
realistic plan for flight tray panel fabrication after completing the first 4
mini-tower trays. Tom said that it
would be good to have this for the DOE by the end of month, when Althouse has
to make a presentation. Sandro says
that a rate of 10 trays per week is planned.
The order for a sufficient number of tools was submitted in
December. One top tray tool is enough
and is already in hand.
Tom said that as soon as the dimensions are
fixed, SLAC will build a tool for the bottom tray assembly. Sandro said that Pisa needs assembly
drawings for importation of everything in the box of top-tray assembly tooling. BJ will email it.
Sandro said that when shipping the MCMs there
should be an identifier number on each board and we should put the same number
on the invoice. When shipping a tool,
give it a name and include a drawing with the invoice to identify it.
For the EM working trays, Sandro plans to
encapsulate the wire bonds from MCM to SSDs on only the last tray, for thermal
vacuum testing. This is to expedite
delivery of the mini-tower.
G&A will finish flight ladder wire bonds
this week for the first lot of ladders (300).
They are close to finishing optimization of the encapsulation. There will be some extra cost, as they must
cure at 60C for four hours, rather than doing a room temperature cure as was
originally planned.
The ladder processing know-how will be transfered
to MIPOT after completing the process at G&A. Tools are ready at MIPOT.
However, Sandro noted that MIPOT needs encapsulant. Tom will procure it. 500g will be enough for the first 100
ladders. MIPOT can procure the
materials after that first lot.
Tom will call Monique today to find about
about the Teledyne status on the remaining working boards. 8 of them were completed before Christmas.
Erik said that Hytec needs the CC test
results by the end of January. Tom will
have a draft plan early next week. The
bottom tray FEA model was built.
Preliminary numbers have come out of that, but they are working on
checking the model. We can expect cost
estimates the first week of March.
Sandro needs to speak to Ronaldo about the
sidewall procurement issues. Tom has a
good quote on all of the material (EM plus flight) from COI and has proposed to
buy that with Pisa buying more SSDs in return.
Althouse agrees in principle to such a swap. Sandro will answer on Monday.
Tom said that he will be at COI on Wednesday, so he would work out the
details then.
Tom said that Ossie is starting to write a
tower assembly document for review by Sandro.
Robert updated and will send out the list of
procurements.
From Bill Althouse:
LAT Managers:
We must get the project back on schedule. Our funding
agencies and SLAC management are demanding it. We owe it to each other that we
deliver what we promised, when we promised. Furthermore, controlling schedule
is important to controlling budget.
We have set a goal of getting back onto our schedule
by the end of FY03. “On schedule at the end of FY03” means less than one week
of unfavorable schedule variance for each subsystem and, therefore, for the
project.
As an intermediate goal, we must stop any further
deterioration immediately. We must be
able to demonstrate at the LAT CDR that we have the schedule under
control. Our intermediate goal is to
have no further slip in schedule between November and the CDR. This means that
the March schedule variance for each subsystem will be more favorable than the
November reported schedule variance.
These are achievable goals but we will need to work
hard to make them happen. Starting immediately, we need to implement the
following policies:
· identify problems early and take quick remedial
action.
· stay
focused and not pursue alternative designs at this point in the project.
· concentrate
more on meeting the schedule and rely less on changing the plan.