Quality Assurance for LHC Gas Systems Stefan Haider / EP-TA1

Quality Assurance, S.Haider Outline Definitions Where do we need Quality Assurance (QA) How do we plan to do it? Handle changes…. Verify along the way Specific activities for Gas Conclusions

Quality Assurance, S.Haider Definitions What is Quality ?  Quality is the extent to which expectations of stakeholders as agreed upon with them are fulfilled. Stakeholders: the experiments, EP-TA1-Gas section, operators, etc… Agreement : we make the gas systems with the experiments requirements and also maintain them

Quality Assurance, S.Haider Where do we need QA Conformity to User Requirements User approved requirements Use of approved materials only Etc Cleanliness Cleaning procedures Procedures that assure the cleanliness of a large order Clean assembly areas Etc Functionality Individual parts Modules Operations procedures Etc We need to assure quality for:

Quality Assurance, S.Haider QA General Recipe  Take User requirement for the gas systems (PRR) Verify that UR’s are measurable! (e.g. are they for cleaning?)  Make an Assembly Breakdown Structure for each gas system  Make a Product Breakdown Structure for each system Look for commonalities: e.g. Mixers have often the same URs  Make a production line for each sub-product Mixer line, distribution, pump, purifier,..etc  Test each module against the Users and our own Requirements.  Make an acceptance test For each module amongst ourselves For the final gas system with the experiments user.

Quality Assurance, S.Haider Handle Changes !!! Introduce a Engineering Change Request ECR  Has to be a single mechanism that transmits the change to all concerned parties  Every change has to pass through analysis, assignment, actual work, test, final report  Every change HAS to be traceable: who triggered it, when, why, etc

Quality Assurance, S.Haider Verify along the way After every step we need control  Procurement Check that we got what we ordered. Correct cleanliness, correct O-rings, dimensions, etc….. + fill check-lists  Assembly Check that every component is on the right place, right assembly direction etc.. + fill check-lists  Test Fill the according check-lists Every rack that leaves our lab should have a folder with all these check lists attached to it.

Quality Assurance, S.Haider Specific activities for Gas Gas hardware production Gas control software production Configuration management for parameters and constants that are needed to operate gas systems.

Quality Assurance, S.Haider Gas Hardware QA structure Documents to be prepared  NUMBERING system and naming conventions  Work instructions for the assembly and labs  Engineering change request form  Test procedures  Test reports  Installation and commissioning  Operation and maintenance  Etc…..

Quality Assurance, S.Haider Conclusions QA for gas is needed With a QA procedure in place,  we make sure that the experiment get what they need  we shall increase transparency of our work  we make sure that during the production nothing is forgotten  We make sure that a maximum of control is available for all parties involved.