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 Supplementary Slides for Software Engineering: A Practitioner's Approach, 5/e Supplementary Slides for Software Engineering: A Practitioner's Approach, 5/e copyright © 1996, 2001 R.S. Pressman & Associates, Inc. For University Use Only May be reproduced ONLY for student use at the university level when used in conjunction with Software Engineering: A Practitioner's Approach. Any other reproduction or use is expressly prohibited. This presentation, slides, or hardcopy may NOT be used for short courses, industry seminars, or consulting purposes.

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 Chapter 9 Software Configuration Management

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 it? A set of activities designed to control change by  identifying the work products that are likely to change,  establishing relationships among them,  defining mechanisms for managing different versions of these work products,  Controlling the changes imposed, and  Auditing & reporting the changes made ++

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 The “First Law” No matter where you are in the system life cycle, the system will change, and the desire to change it will persist throughout the life cycle. Bersoff, et al, 1980

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 What Are These Changes? data otherdocuments code Test Project Plan changes in technical requirements changes in business requirements changes in user requirements software models

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 The Software Configuration programs documents data The pieces – the output of SW process The items that comprises all information produced as part of the software process

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 Change & SCM Software Engineering a TQM foundation procedures methods tools SCM identification identification version control version control change control change control auditing auditing reporting reporting construction construction

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 Baselines  A specification or product that has been formally reviewed and agreed upon, that thereafter serves as the basis for further development, and that can be changed only through formal change control procedures  Eg. System Specification, SW requirements, design specification, source code, test plan, operational system ++

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 SCI (Software Configuration Items)  Information that is created as part of the software engineering process  eg,. A single section of a large specification, or one test case in a large suite of tests  It is a document, an entire suite of test cases, or a named program component (eg. C++ function)  Specific versions of editors, compilers, and other CASE tools may be “frozen” as part of the software configuration ++

10 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 Identification of Objects Two types of objects: 1.Basic object: a “unit of text” that has been created during analysis, design, code, or test. Eg. A section of requirement specification, a source listing for a component, a suite of test cases 2.Aggregate object is a collection of basic objects and other aggregate objects Eg. Design specification ++

11 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 Object Features  Name: a character string  Description: a list of data items that identify the SCI type (document, program, data) a project identifier change/version information  List of resources: entities that are provided, processed, referenced or otherwise required by the object. eg. Data types, specific functions, variable names  “realization”: a pointer to the basic object ++

12 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 Version Control  Combines procedures and tools to manage different versions of configuration objects  Eg. Evolution graph each node is a complete version each version is a collection of SCIs (source code, documents, data) Each version may be composed of different variants eg. A version composed of entities: 1, 2, 3, 4, 5 Two variants (1) entities 1, 2, 3, 4 for color display (2) entities 1, 2, 3, 5 for monochrome ++

13 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 Version Control (2) Obj 1.0 Obj 1.1 Obj Obj Obj 1.2 Obj 1.3 Obj 2.0 Eg. Version 1.1.2, 1.3 & 2.0 are currently supported Evolution graph ++

14 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 Change Control STOP

15 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 Change Control Process—I change request from user developer evaluates change report is generated change control authority decides request is queued for action Engineering Change Order generated change request is denied user is informed need for change is recognized change control process—II

16 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 Change Control Process-II assign people to SCIs check-out SCIs make the change review/audit the change establish a “baseline” for testing change control process—III

17 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 Change Control Process-III perform SQA and testing activities promote SCI for inclusion in next release rebuild appropriate version review/audit the change include all changes in release check-in the changed SCIs

18 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 Elements of Change Control  Access Control: governs which software engineers have the authority to access and modify a particular configuration object  Synchronization control: helps to ensure that parallel changes, performed by two different people, don’t overwrite one another ++

19 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 Audit  How do we ensure that the change has properly implemented? 1.Formal Technical Reviews: focuses on the technical correctness of the configuration object that has been modified 2.Software Configuration Audit: complements the Formal Technical Reviews by assessing for a configuration object for characteristics that are generally not considered during review ++

20 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 Auditing SCIs ChangeRequests SQAPlan SCM Audit

21 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 Status Accounting SCIs ChangeRequests ChangeReports ECOs Reporting

22 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 Configuration Status Reporting (CSR)  An SCM task that answer the following questions 1.What happened? 2.Who did it? 3.When did it happen 4.What else will be affected? ++