Human Aspects of System Design Introduction
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07.04.2018
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Human Aspects of System Design
Introduction
Designing the human element into a system is paramount to its success
One error incorporated by the human into the system could bring a major catastrophe
Some Examples:
System Design Process
Molecularization
System Definition
Limitation & Constraints
Transformation
Iteration
Competition
Relevance
Molecularization
Characteristics of a System Design Process
Requirements of the system define options
Limitations and processes that are unsure
Characteristics of a System Design Process
Transformation
Time and Cost Constraints
Characteristics of a System Design Process
Iterative Cycle
Characteristics of a System Design Process
Competition between groups within the design team
Relevance to the design
Six Major Stages in the Design Process
Six Major Stages in the Design Process
STAGE 1 : System Requirements
Determine the objectives and principles of the process
Objective
- purposes of the system
- general terms
- details what system is to do to meet objectives
- defines constraints
System Performance Specifications
Two HF activities appropriate at Stage 1
Two HF activities appropriate at Stage 1
(1) Identify all users of the machine
(2) Identify the activity-related needs of users which the
system will be responsible for
STAGE 2 : Definition of the system
STAGE 2 : Definition of the system
Define system functions to meet performance criteria
STAGE 3 : Basic Design
STAGE 3 : Basic Design
Allocation of functions to human, computer, and software
Some Guidelines for Designers
Guidelines to Allocate Functions
Guidelines to Allocate Functions
(1) Mandatory Allocation
(2) Balance of Value
(2) Balance of Value
(3) Utilitarian and cost-based allocation
(3) Utilitarian and cost-based allocation
(4) Affective and cognitive support allocations
STAGE 4 : Interface Design
STAGE 4 : Interface Design
STAGE 5 : Facilitator Design
STAGE 5 : Facilitator Design
STAGE 6 : Testing and Evaluation
STAGE 6 : Testing and Evaluation
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