chapter 4 preliminary system design n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Chapter 4. Preliminary System Design PowerPoint Presentation
Download Presentation
Chapter 4. Preliminary System Design

Loading in 2 Seconds...

play fullscreen
1 / 11

Chapter 4. Preliminary System Design - PowerPoint PPT Presentation


  • 106 Views
  • Uploaded on

Chapter 4. Preliminary System Design. It is also known as advance development It extends the translation of system level requirement into design requirements for the sub system level. The Functional Analysis Process.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Chapter 4. Preliminary System Design' - walker


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
chapter 4 preliminary system design
Chapter 4. Preliminary System Design
  • It is also known as advance development
  • It extends the translation of system level requirement into design requirements for the sub system level
the functional analysis process
The Functional Analysis Process
  • Functional analysis is the iterative process of breaking down requirements from the system level to the sub system
  • FA reflects the “what” that must be accomplished to achieve objective & goal
  • Conversion to “how” is accomplished by evaluating each individual block, defining the necessary “inputs” & expand “outputs”
slide3

Identify need & determine

system requirement

Design and Develop

system

Manufacture

System

Operate and maintain

system

Control/Constraints

Technical

Political

Sociological

Economic

Environmental

System/product ready

supporting resources

waste

System requirement

organizational stru.

Raw material

Data/documentation

Function

Output

Input

HR

Material/liquid

Computer resources

Facilities

Maintenance and support

Mechanisms

Identification of Resources Requirements

requirement allocation
Requirement Allocation
  • Fig. 4.6 page 81
design requirements
Design Requirements
  • Compatible with the system operational requirements and maintenance
  • Comply with the allocated design criteria
  • Meet all specification requirements
design requirements parameters
Design Requirements(Parameters)
  • Design for functional capability- concerns with chemical,electrical, mechanical design etc
    • capability derives from the characteristic of design that relates to the functional performance of the system (factors-size, shape, volume
  • Design for reliability- objective is maximize operational reliability and minimize the failure
    • reliability (R) is often expressed as probability of success
design requirements parameters1
Design Requirements(Parameters)
  • Design for maintainability
    • characteristic of design & installation that reflect the ease, accuracy and safety
    • it can be measured in terms of maintenance time
    • minimize the logistic support resources
  • Design for usability and safety
    • concerned with the interfaces between human & HW, SW etc
    • consideration must include human sensory, physiological, minimize the number of people and skill requirement, minimize training and maximize productivity
design requirements parameters2
Design Requirements(Parameters)
  • Design for supportability/serviceability
    • ensure that system can ultimately be serviced and support effectively/efficiently through out planned cycle time
    • includes an application of reliability, maintainability and human factor in design
  • Design for producibility and disposability
    • characteristic of design that pertains to the ease and economy of producing system/products
    • using flexible and economical methods
    • utilization of standard parts
    • allows for the disassembly and disposal of elements or components of the system easily/rapidly changes
design requirements parameters3
Design Requirements(Parameters)
  • Design for affordability
    • characteristic of design and installation that impact budget constraints
    • objective is to base design decision on life cycle cost not just system acquisition
    • economic feasibility on the balanced incorporation of reliability, maintainability, human factor, supportability