VAM00223_engl

DAIMLERCHRYSLERProcess Procedure , POS EnginesVAM00223 Key Characteristics Page 1 of 5 0 Distribution List: PBE/PLD PBE/PPR PBE/PM PBE/PE PBE/PMM E/PHM PBE/PMS E/PHA PBE/PT PBE/PTA PBE/PTM PBE/PTS PBE/PQE PBE/PQT PBE/D PBE/PLC PBE/DM PBE/DH PBE/DHD1Purpose Description of procedure for specifying and handling key characteristics Scope of Application On-highway engine power systems Terms KC FMEA D-FMEA23P-FMEAKey characteristics Failure mode and effects analysis System FMEA for "design" or "product" (The two variants merge at the interface from the overall system to the individual component.) System FMEA for "process" (This variant looks at the possible risks involved in manufacturing and assembly processes.)4Responsibilities Cross-departmental team: composed of representatives from the Development, Engineering, Production, Quality Management and Sales departments Description Identification of KCs5 5.1All product characteristics are essentially important and must be monitored. However, certain characteristics must be subjected to particular checks, as they affect: • Safety (e.g. danger to user in the case of a failure) • Statutory requirements (e.g. emissions) • Functionality (e.g. availability, performance, service life requirements) • Appearance (e.g. surface characteristics)Published: Replaced: File: 11.03.2002 08.06.1999 VAM00223.doc Prepared by: Jörg Schneider, PBE/QMT Approved by: Thomas StengelDAIMLERCHRYSLERProcess Procedure , POS EnginesVAM00223 Key Characteristics Page 2 of 5 • Increased expenditure and/or complexity in process design and the process cycle, or the ease of assembly (e.g. in the case of deviations in dimensions) more heavily than others.Specification as a KC is necessary or advisable: • Where possible consequences of errors take on greater significance (particularly, for example, if a failure cannot be “intercepted” by a redundant design) • In the case of limited permissible distributions of characteristics (even minor deviations constitute non-compliance with the product requirements) • With a highly complex overall system (high level of mutual interaction with effects that are hard to assess) • Where the product is extremely innovative (little empirical evidence); existing KCs from previous products must be applied to a new product of a comparable scope. • Where there is negative empirical evidence for a product or process (critical test or field data for current or previous products or manufacturing/assembly difficulties) • When expressly requested by a customer. The identification of KCs should be performed by a cross-departmental team of representatives from Development (Design and Testing), Engineering, Production (Manufacturing and Assembly), Quality Management and Sales ("voice of the customer"). These activities must be organized in the form of product projects. In the event of (retrospective) requests for changes or additions to the KCs by one of the parties involved, the exchange of information with the other disciplines must be ensured. Similarly to the above points, the identification and handling of KCs by suppliers must be agreed and specified in the Requirement Specifications as part of project processing. In the case of explicit customer requirements and other cases with identifiable cost implications, KCs must be negotiated via AEMA/KAEA. 5.2 Supportive Methods for Identifying KCsThe identification of KCs can usefully be combined with the creation of risk analyses in the form of FMEAs (D- or P-FMEA) and/or other risk assessment methods (e.g. 8D method). The assessment is similar and the same parties are generally required to process the assessment. The FMEA parameters can serve as a guide (e.g. high B grades indicate serious consequences of errors, while high A grades indicate problematical design or process parameters). However, using FMEA parameters as the sole basis is not advisable, as the above assessment criteria extend far beyond the criteria that can be shown in the FMEA assessment. Characteristics with a rating > 5 in at least one of the FMEA individual parameters (B, A, E), should be checked with regard to classification as a KC (taking into account other criteria with a 0 rating).11.03.02DAIMLERCHRYSLERProcess Procedure , POS EnginesVAM00223 Key Characteristics Page 3 of 5 The exchange of information between Development and Manufacturing/Assembly about the respective characteristics identified must be ensured, i.e. characteristics identified in the context of a D-FMEA (in Development) as relevant to KCs must be forwarded, just as KCs identified in the context of a P-FMEA are to be fed back to Development. 5.3 Identification and Tracking of KCsKCs are only shown in drawings (including text drawings) and engine acceptance sheets and are updated by Development. KCs are identified by means of the symbol in the drawing and bold type in the engine acceptance sheets. KCs are then incorporated into test specifications, test drawings and test plans at the production plant. KCs are recorded randomly during production and evaluated statistically by QME.11.03.02DAIMLERCHRYSLERProcess Procedure, Powertrain Business Unit EnginesKey CharacteristicsVAM 00223 Page 4 of 55.4Overall Process for Specifying and Tracking a KC6Other Applicable Documents VAM00054 Procedure for specifying production processes VAM00065 Quality planning of in-house parts VAM00228 Project management Annexes None08.06.1999 VAM00223.doc Prepared by: Henner Wolf Approved by: Thomas Stengel7Published: Replaced: File:DAIMLERCHRYSLER«Type», Powertrain Business Unit EnginesKey CharacteristicsVAM 00223 Page 5 of 5Published: Replaced: File:08.06.1999 VAM00223.docPrepared by: «Author»«Approved by»: «Approved_by»。