the product.ppt
- 1. 1 These courseware materials are to be used in conjunction with Software Engineering: A Practitioner’s Approach, 5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001 Chapter 1 The Product
- 2. 2 These courseware materials are to be used in conjunction with Software Engineering: A Practitioner’s Approach, 5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001 What is Software? 1) instructions (programs) that when executed provide desired function and performance 2) data structures that enable the programs to adequately manipulate information 3) documents that describe the operation and use of the programs A logical rather than physical system element
- 3. 3 These courseware materials are to be used in conjunction with Software Engineering: A Practitioner’s Approach, 5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001 What is Software? software is engineered software doesn’t wear out software is custom built software is complex
- 4. 4 These courseware materials are to be used in conjunction with Software Engineering: A Practitioner’s Approach, 5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001 Failure (“Bathtub”) Curve for Hardware Time Failure Rate Infant mortality Wear out
- 5. 5 These courseware materials are to be used in conjunction with Software Engineering: A Practitioner’s Approach, 5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001 Wear vs. Deterioration
- 6. 6 These courseware materials are to be used in conjunction with Software Engineering: A Practitioner’s Approach, 5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001 Software Applications system software real-time software business software engineering/scientific software embedded software PC software WebApps (Web applications) AI software
- 7. 7 These courseware materials are to be used in conjunction with Software Engineering: A Practitioner’s Approach, 5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001 Software Myths Management We have standards We have new computers We’ll add more people to catch up I outsourced it, I’m done Customer We have general objectives, let’s start Change is easily accommodated Practitioner We’ll write it and be done I can’t assess quality until it is running I only need deliver code Software engineering is about meaningless documents
- 8. 8 These courseware materials are to be used in conjunction with Software Engineering: A Practitioner’s Approach, 5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001 The Cost of Change
- 9. 9 These courseware materials are to be used in conjunction with Software Engineering: A Practitioner’s Approach, 5/e and are provided with permission by R.S. Pressman & Associates, Inc., copyright © 1996, 2001 Software Poses Challenges How do we ensure the quality of the software that we produce? How do we meet growing demand and still maintain budget control? How do we upgrade an aging "software plant?" How do we avoid disastrous time delays? How do we successfully institute new software technologies?