EPICS Design

Process

Design Process and Project Mgt

Many models and tools Design Process

o Mechanical Engineering • Ullman’s - 6 steps

o Engineering Your Future• 10 steps

o Different Companies use different models • They all use some process

Avoid “hobbyist approach” and inefficient project progress

EPICS teaches a model that fits community-based designs

EPICS Design Process

Six Phases

1. Problem Identification

2. Specification Development

3. Conceptual Design

4. Detailed Design

5. Production

6. Service/Maintenance

7. Redesign or retirement

The EPICS Design Cycle

Specification Development

Detailed Design

Production

ServiceMaintenance

Redesign

Retirement

Problem Identification

ConceptualDesign

Disposal

EPICS Design Process

Six Phases

1. Problem Identification

2. Specification Development

3. Conceptual Design

4. Detailed Design

5. Production

6. Service/Maintenance

7. Redesign or retirement

Problem Identification

Tasks – o Identify problemo Determine project objectiveso Determine motivation for projecto Identify outcomes or deliverableso Determine duration of the projecto Identify community partner contact

Deliverables - Project Charter

Specification Development

Tasks o Complete users and beneficiaries analysis o Define the customer requirements o Evaluate design constraints o Develop engineering specifications o Compare to benchmark products (prior art)o Determine design targets

Deliverables- Project Specification Document

Conceptual Design

Tasko Complete Functional Decomposition of

projecto Complete Decision Matrix of requirementso Define how users will interact with projecto Analyze/evaluate potential solutionso Choose best solution

Deliverables- Project Conceptual Design Report

Detailed Design Tasks

o Complete top down specification/ bottom-up implementation (freeze interfaces)

o Analysis/evaluation of project, sub-modules and/or components

o Prototyping/proof-of-concept of project, sub-modules and/or components

o Field test prototype/get feedback from userso Complete DFMEA analysis of projecto Determine what user training is necessary

Deliverables o Project Detailed Design Reporto Prototype version of project

Production Phase

Taskso Complete production version of the projecto Complete user manuals/training materialo Complete delivery review

Deliverableso Delivered projecto Project Delivery Report o Delivery checklisto User manuals

Service/Maintenance Phase

Taskso Evaluate performance of fielded projecto Determine what resources are necessary

to support and maintain the project

Deliverableso Fielded Project Report

Redesign or Retirement Decisions

The EPICS Design Cycle

Specification Development

Detailed Design

Production

ServiceMaintenance

Redesign

Retirement

Problem Identification

ConceptualDesign

Disposal

Iterations in the Design Process

Disposal

Specification Development

Detailed Design

Production

ServiceMaintenance

Redesign

Retirement

Problem Identification

ConceptualDesign

Iterations in the Design Process

Disposal

Specification Development

Detailed Design

Production

ServiceMaintenance

Redesign

Retirement

Problem Identification

ConceptualDesign

Iterations in the Design Process

Disposal

Specification Development

Detailed Design

Production

ServiceMaintenance

Redesign

Retirement

Problem Identification

ConceptualDesign

Iterations in the Design Process

Disposal

Specification Development

Detailed Design

Production

ServiceMaintenance

Redesign

Retirement

Problem Identification

ConceptualDesign

Seeking and Selecting

Each phase of the design process has divergent (creative) steps and convergent

steps where options are selected

Diverge Seek Possibilities

ConvergeNarrow Choices

Problem Identification

Specification DevelopmentConverge

Narrow Choices

Diverge Seek Possibilities

Generate Ideas

Define Measurable Specifications

Implement

Test

Advancing

Generate Ideas

Define Measurable Specifications

Implement

Test

Go to next phase

Iterating – going back

Generate Ideas

Define Measurable Specifications

Implement

Test

Back to previous phase

Iteration and testing

Prob ID

Spec Dev

Con Des

Det Des

ProdMain and

serv.

•Document•Why advanced•Why interated

Design Record A design record is a (short) report of an engineering

analysis that has been completed regarding your project. o They should be named as follows:

• TEAM-PROJECT-SEM-Number (example SLAC-VLM-F04-1). Example activities recorded in a Design Record:

o Circuit simulationo Education materials o CAD modeling of projecto Safety calculationso Experimental measurementso Design rational: Why did you choose a particular design

approach, algorithm, etc.o Component selection: Why did you choose a particular

component? Sr. Design Students should Author Design Records

Design Decision Table

A table with summarizes design decisions which you have made.

They should reference a Design Record.Design decisions could include:

o Architectureo Algorithmso Tools/Environmento Component selectiono Material selection