Lecture 3 -...

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Week 3: System Requirements and Process Modeling - Lecture Help Print This Page Requirements Determination Determining Requirements | Traditional Methods for Determining Requirements | More Modern Approaches for Determining Systems Requirements | Radical Approaches: Business Process Reengineering | Process Modeling | Data-Flow Diagramming | Logical Modeling This week, we will discuss the second phase of the development life cycle. The analysis phase is when the Business Systems Analyst (BSA) reviews the customer's needs, captures them, and places them in a logical order for development. The BSA also researches various technologies to meet the requirements and prepares an evaluation process to narrow down the solution options so the business can select the best one for their situation. We will explore various approaches to gathering requirements and data collection. The traditional approach is where the BSA interviews current users of the old system, actually observes how the workers do their jobs, and then reviews all manuals, procedures, and other documentation. A modern approach using computers includes Joint Application Design (JAD) sessions, and building a working model of the new system, called prototyping . Determining Requirements To determine the requirements for the new system, information is collected from all possible sources. The BSA reviews the business processes, forms, and reports. Several characteristics are required by an analyst during Requirements determination activities. Impertinence . This means to question everything - no sacred cows! 1. Impartiality . Do not side with any one stakeholder or department. Your job is to consider what is best for the entire organization. 2. Relaxing constraints . Assume anything is possible; ignore habits or traditions. 3. Attention to details . Make sure the facts fit together. 4. Reframing . Look at the technology, the organization, and the business climate in a new way! Each system and organization is unique. 5. The requirements determination process requires a lot of information to be gathered. This information will be stored in a central repository and will include - notes from surveys and interviews notes taken from observing workers reports, forms, and other documentation analysis job descriptions By the end of the requirements gathering process, the BSA will have a good understanding of: The objectives of the business and the policies, guidelines, and culture. 1. What information people need to do their jobs. 2. How data and information are processed and stored. 3. Traditional Methods for Determining Requirements .. 1 of 5 11/3/2010 7:28 PM
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An analyst must gather data and information from all levels of employees who indirectly or directly use the system. The systems analyst gathers information describing the existing system, what the new system needs to do, and performs a gap analysis to determine what the differences are between the
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This note was uploaded on 12/28/2010 for the course MGMT 340 taught by Professor Kerns during the Spring '10 term at DeVry Columbus North.

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Lecture 3 -...

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