On the design and development of program families Presented by: M. Deng and J. Zhang 4/15/2002 CSE870 Advanced Software Engineering, Spring 2002

Overview Objective –Definition of program families A set of programs –First common features of these programs –Then variation of each program Example: Microsoft Office Family –Three techniques Traditional method: Sequential development method Two new methods: –Stepwise refinement method –Specification of information hiding modules method [Parnas76] David Parnas, “On the design and development of program families,” IEEE Transactions on Software Engineering, SE-2(1), 1-9, 1976.

Overview (cont’d) Technique Overview –Sequential Method Features Disadvantages

Overview (cont’d) –Stepwise Method Vs. Specification Method Features Combination

Impact Product line –Definition: a group of products that share a set of commonalities that meet the requirements of the market –CMU/SEI: a Framework of Software Product Line Practice –CMU/SEI: 1 st Software Product Line Conference (SPLC1) in 2000 Information hiding design principle in O bject- Oriented programming languages And so on

Related 1: Commonality Analysis Objective –To identify the common features and variations among family members Technique Overview –FAST (Family-oriented Abstraction, Specification and Translation) process –An early step of the FAST process –Participants: Moderator, recorder, family analysis experts [Weiss98] David Weiss, “Commonality Analysis: A Systematic Process for Defining Families,” in 2 nd International Workshop on Development and Evolution of Software Architectures for Product Families, February 1998.

Related 1 (cont’d) –Result: Commonality Analysis Document –Form: to hold a series of meetings Five stages: –Prepare –Plan –Analyze: central part –Quantify –Review –Applicability: Has been practiced in Lucent Technologies How it extends Parnas’ work? –Provide a process

Related 2: Adaptable Components Objective –One component represents a family of components Technique Overview –An adaptable component has a group of parameters of adaptability [Campbell99] Grady Campbell, “ Adaptable Components, ” in Proceeding of 21 st International Conference on Software Engineering (ICSE99), ACM, , 1999.

Related 2 (cont’d) –Two models of reuse: Usual reuse model –Select from a library of components –Customize and then construct a new component –Time-consuming, error-prone Adaptable component based reuse model –Select from the name of adaptable component –Make the decisions of parameters How it extends Parnas’ work? –A component family

Related 3: Combining Product Line Engineering with Options Thinking Objective –To introduce an appropriate economic model to justify the use of product line approach Technique Overview –Product line approach needs more initial investment –The DCF Model can be used to justify the use of product line in cell phone companies –The DCF is not suitable to justify product line approach in an evolutionary product –The BSOP Model is a Model used in stock market to value the option. It is more suitable to justify an evolutionary product [Geppert01] Birgit Geppert and Frank Roessler, “Combining Product Line Engineering with Options Thinking,” in Proceedings of Product Line Engineering: The Early Steps (PLEES’01), September 2001.

Related 3 (cont’d) How it extends Parnas’ work –Product line is an extension of program family –This work introduces an economic model to justify the use of the product line

Uncited: Multi-Staged Scoping for Software Product Lines Objective –To propose a scoping method for the product line approach Technique Overview –Why we need scoping? –What requirements a sound scoping method should meet? –Three components of the proposed scoping method Product line mapping, domain based scoping, feature based scoping [Schmid00] Klaus Schmid, “Multi-Staged Scoping for Software Product Lines,” in Proceedings of Software Product Lines: Economics, Architecture, and Implications, June 2000.

Why it should have cited the paper This paper should have cited Parnas’ paper for the same reason as the previous paper –Product line is a industrial interpretation of program family –This paper proposes a scoping method in product line

References D. Parnas, “On the design and development of program families,” IEEE Transactions on Software Engineering, SE-2(1), 1-9, D. Weiss, “ Commonality Analysis: A Systematic Process for Defining Families, ” in 2 nd International Workshop on Development and Evolution of Software Architectures for Product Families, February G. Campbell, “ Adaptable Components, ” in Proceeding of 21 st International Conference on Software Engineering (ICSE99), ACM, , 1999.

References B. Geppert and F. Roessler, “Combining Product Line Engineering with Options Thinking,” in Proceedings of Product Line Engineering: The Early Steps (PLEES’01), September K. Schmid, “Multi-Staged Scoping for Software Product Lines,” in Proceedings of Software Product Lines: Economics, Architecture, and Implications, June 2000.