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A Quality Process for developing Diagnostic Systems and Strategies

IP.com Disclosure Number: IPCOM000074334D
Publication Date: 2005-Feb-23
Document File: 2 page(s) / 25K

Publishing Venue

The IP.com Prior Art Database

Abstract

The purpose of the diagnostic development process is to achieve robust diagnostic systems by applying innovative and known quality design tools in a consistent and structured manner. This process enables initial and/or existing designs to be evaluated against design constraints and criteria to quantify the design's integrity. Although the process has been developed with reference to diagnostic development, it is also applicable to any control system design.

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A Quality Process for developing Diagnostic Systems and Strategies

The purpose of the diagnostic development process is to achieve robust diagnostic systems by applying innovative and known quality design tools in a consistent and structured manner. This process enables initial and/or existing designs to be evaluated against design constraints and criteria to quantify the design's integrity. Although the process has been developed with reference to diagnostic development, it is also applicable to any control system design.

The advantages of the structured process in comparison to normal design procedures/tools are that:

* Concepts can be assessed in a structured and rigorous way enabling the best solution(s) to be selected for development.

* The process assists engineers to understand, communicate, and measure the feasibility and robustness of the design prior to any pre-production build process.

* The process steps and information are traceable.

* The process can be shared and adopted by both OEM's and supplier companies to ensure synergy in the design methodology.

* The process generates information to support (a) build and validation of prototype and production builds; (b) service diagnosis.

The structure of the diagnostic development process directs the design team through a range of engineering quality tools in a logical progression. The process is based around the Design for Six Sigma (DfSS) criteria and includes:

* Define: Defining the specific diagnostic system requirements, including any legal aspects.

* Characterise: Identifying methods of fulfilling those requirements (the concepts).

* Optimise: Analysing the robustness of the concept to producing a system design.

* Verify: Implementation and validation of system design.

Within each section there are a number of interlinked tasks, which identifies the information, resource and time required to achieve the appropriate output.

This process has the following novel features:

* Applying a process comparable with Design for Six Sigma to develop diagnostic and control systems.

* Analysis of several concepts rather than individual concept optimisation.

* Definition and application of process logic steps/route map.

* Assignment of the 'Level of diagnostic': a guide to system complexity leading to an early indication of the robustness of the system, and the development and calibration effort required.

* Application of a variation 'tree' and its consideration to robustness analysis. This technique cascades the parameters that influence the system being analysed in a manageable way, allowing th...