From: Bernard.Collaudin@space.alcatel.fr
Sent: 22 February 2002 19:41
To: puget@ias.fr; charra@ias.fr; valerie.demuyt@ias.u-psud.fr;
alpog@mpe.mpg.de; ohb@mpe.mpg.de; pacs@mpe.mpg.de; thijsdg@sron.rug.nl;
C.K.Wafelbakker@sron.nl; HIFI-Prof@sron.nl; reno@tesre.bo.cnr.it;
butler@tesre.bo.cnr.it; taddei@tesre.bo.cnr.it;
Matt.Griffin@astro.cf.ac.uk; k.j.king@rl.ac.uk; J.A.Long@rl.ac.uk
Cc: gerald.crone@esa.int; astrid.heske@esa.int;
Javier.Marti.Canales@esa.int; Jean.Bruston@esa.int;
Thomas.passvogel@esa.int; Jean-Jacques.Juillet@space.alcatel.fr;
Pascal.Rideau@space.alcatel.fr;
Jean-Philippe.Chambelland@space.alcatel.fr; Glenn.Lund@space.alcatel.fr;
Edgar.Hoelzle@astrium-space.com; mcesa@to.alespazio.it;
Sabine.Raphel@space.alcatel.fr
Subject: Evolution of Instrument size, and processing of Change requests
H -P-ASPI-LT-1027


This mail reference: H-P-ASPI-LT-1027

Sir
Following the recent Alcatel campaign to collect refined information related to
instrument warm units definition, identification and position of connectors, we
have identified that a certain number of dimensions of warm units were
significantly different from the one used for the satellites design for the PDR
(based on IIDB version 2, version 2.1, or IID-B CR's being processed).

You have to understand that the spacecraft is being designed with a PDR very
soon. You cannot initiate unilaterally significant change in your instrument
that will affect the  interfaces to the spacecraft without having any discussion
with the project.
We are freezing most of the interfaces for the PDR with several levels of
subcontractors involved in the loop now. Your instrument might be not compatible
with the PDR design.

In parallel,  the IID change process which should be used for these
modifications is not fast enough. This is mainly because of the serial
processing the CR's (Instrument ->ESA->Alcatel->processing by
Alcatel/Astrium/Alenia->Alcatel->ESA->Instruments, + some iterations required
sometime). We have to improve it.

We propose to modify the IID change process in the following way:

All change proposed by the instrument (or project) team are discussed in
priority during the Instrument Interface meetings, or regular teleconference if
these meetings spacing is too long.
The objective is
     to justify the need of such change,
     identify its criticality and the effort required to implement it
     negotiate it if necessary
     Rank it (ie CR with no impact, or with impact on Cost & schedule)
     Identify who is processing it (Alcatel/Astrium/Alenia)
     Agree on a target date for conclusion
From this exchange, a formal CR  is Established (with configuration control),
and will be processed by Industry and ESA.

Can you comment about this proposition ? IF OK, this proposition should be
applicable from now.

Best regards,

Bernard COLLAUDIN - Alcatel Space Industries - V7Z-A22
100, Bd du midi, BP 99  -   06156 Cannes la Bocca Cedex- France
Tel:+(33)(0) 4 92 92 30 21      Fax: +(33)(0) 4 92 92 30 10    Mob: +(33)(0)6 18
42 78 35
email: bernard.collaudin@space.alcatel.fr

ALCATEL SPACE INDUSTRIES