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Chapter 10 System Engineering

Chapter 10 System Engineering. The Hierarchy. Business Process Engineering. uses an integrated set of procedures, methods, and tools to identify how information systems can best meet the strategic goals of an enterprise focuses first on the enterprise and then on the business area

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Chapter 10 System Engineering

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  1. Chapter 10System Engineering

  2. The Hierarchy

  3. Business Process Engineering • uses an integrated set of procedures, methods, and tools to identify how information systems can best meet the strategic goals of an enterprise • focuses first on the enterprise and then on the business area • creates enterprise models, data models and process models • creates a framework for better information management distribution, and control

  4. The BPE Hierarchy • Information strategy planning (ISP) • strategic goals defined • success factors/business rules identified • enterprise model created • Business area analysis (BAA) • processes/services modeled • interrelationships of processes and data • Application Engineering • a.k.a ... software engineering • modeling applications/procedures that address (BAA) and constraints of ISP • Construction and delivery • using CASE and, testing

  5. Information Strategy Planning • Management issues • define strategic business goals/objectives • isolate critical success factors • conduct analysis of technology impact • perform analysis of strategic systems • Technical issues • create a top-level data model • cluster by business/organizational area • refine model and clustering

  6. Defining Objectives and Goals • Objective—general statement of direction • Goal—defines measurable objective: “reduce manufactured cost of our product” • Subgoals: • decrease reject rate by 20% in first 6 months • gain 10% price concessions from suppliers • re-engineer 30% of components for ease of manufacture during first year • objectives tend to be strategic while goals tend to be tactical

  7. Business Area Analysis • define “naturally cohesive groupings of business functions and data” • perform many of the same activities as ISP, but narrow scope to individual business area • identify existing (old) information systems / determine compatibility with new ISP model • define systems that are problematic • defining systems that are incompatible with new information model • begin to establish re-engineering priorities

  8. The BAA Process admin. manufacturing QC distribution sales acct eng’ring Process Decomp. Diagram Matrices e.g., entity/process matrix Process Flow Models Data Model

  9. Product Engineering

  10. Requirements Engineering • Elicitation — determining what the customer requires • Analysis & negotiation — understanding the relationships among various customer requirements and shaping those relationships to achieve a successful result • Requirements specification — building a tangible model of requirements

  11. Requirements Engineering • System Modeling — building a representation of requirements that can be assessed for correctness, completeness, and consistency • Validation — reviewing the model • Management — identify, control and track requirements and the changes that will be made to them

  12. Product Architecture Template

  13. Architecture Flow Diagram

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