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Lecture Systems analysis and design methods (7/e): Chapter 6 – Whitten, Bentley

Effective fact-finding techniques are crucial to the development of systems projects. In this chapter you will learn about techniques to discover and analyze information system requirements. You will learn how to use various fact- finding techniques to gather information about the system’s problems, opportunities, and directives. | Chapter 6 Fact-Finding Techniques for Requirements Discovery Objectives Define system requirements and differentiate between functional and nonfunctional requirements. Understand the activity of problem analysis and be able to create an Ishikawa (fishbone) diagram. Understand the concept of requirements management. Identify and characterize seven fact-finding techniques. Understand six guidelines for effective listening. Understand body language and proxemics. Characterize the typical participants in a JRP session. Complete the planning process for a JRP session. Describe benefits of JRP as fact-finding technique. Describe a fact-finding strategy that will make the most of your time with end-users. 6- 6- Introduction to Requirements Discovery Requirements discovery – the process and techniques used by systems analysts to identify or extract system problems and solution requirements from the user community. System requirement – something that the information system must do or a | Chapter 6 Fact-Finding Techniques for Requirements Discovery Objectives Define system requirements and differentiate between functional and nonfunctional requirements. Understand the activity of problem analysis and be able to create an Ishikawa (fishbone) diagram. Understand the concept of requirements management. Identify and characterize seven fact-finding techniques. Understand six guidelines for effective listening. Understand body language and proxemics. Characterize the typical participants in a JRP session. Complete the planning process for a JRP session. Describe benefits of JRP as fact-finding technique. Describe a fact-finding strategy that will make the most of your time with end-users. 6- 6- Introduction to Requirements Discovery Requirements discovery – the process and techniques used by systems analysts to identify or extract system problems and solution requirements from the user community. System requirement – something that the information system must do or a property that it must have. Also called a business requirement. 6- Functional vs. Nonfunctional Requirements Functional requirement - something the information system must do Nonfunctional requirement - a property or quality the system must have Performance Security Costs 6- Results of Incorrect Requirements The system may cost more than projected. The system may be delivered later than promised. The system may not meet the users’ expectations and they may not to use it. Once in production, costs of maintaining and enhancing system may be excessively high. The system may be unreliable and prone to errors and downtime. Reputation of IT staff is tarnished as failure will be perceived as a mistake by the team. 6- Relative Cost to Fix an Error 6- Criteria for System Requirements Consistent – not conflicting or ambiguous. Complete – describe all possible system inputs and responses. Feasible – can be satisfied based on the available resources and constraints. Required – .