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Methodology-free software development: Why having hundreds of methodologies?

Methodology-free software development: Why having hundreds of methodologies?. Herwig Mannaert. Which Methodologies ?. More than 1000 exist... BON ,   Booch ,   BOOM ,   Catalysis ,   CBD/e ,   Coad/Yourdon ,   COMMA CRC ,   Convergent Engineering ,   Demeter ,   DOORS ,   DOOS

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Methodology-free software development: Why having hundreds of methodologies?

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  1. Methodology-free software development: Why having hundreds of methodologies? Herwig Mannaert

  2. Which Methodologies ? • More than 1000 exist... • BON,   Booch,   BOOM,   Catalysis,   CBD/e,   Coad/Yourdon,   COMMA • CRC,   Convergent Engineering,   Demeter,   DOORS,   DOOS • EPA,   EROOS,   Fusion,   Goofee,   HOOD,   IDEA,   ION,   KISS • MERODE,   MOSES,   MWOOD,   Object COMX,   Objecteering • Objectory,   OEP,   Octopus,   OMT,   OOAD/OOIE,   OOA/RD,   OOBE • OOCL,   OOHDM,   OOram,   OOSC,   OOSD,   OOSE,   OOSP • Open,   OSA,   PAUD,   ROAD,   ROPES,   RUP,   Scrum,   Skill-Driven Design • SDL,  Shlaer & Mellor,   Softstar,   SOMA,   SOMT,   Syntropy,   XP • Which one do we use ? • The “methodology jungle”...

  3. Adoption of Methodologies • Huisman & IIvari, 2002: “Many organizations claim that they do not use any systems development methods.” • Riemenschneider, 2002: “Only about half of all organizations actually follow a methodology” • Interpretation • Explicit use • Implicit use • Ad hoc

  4. Common Flaws of Methodologies • Most methodologies manage the process: • “Managing the process is what you do if you cannot manage the product.” • Example: assembly lines in manufacturing • Most IT projects are/should be closer related to manufacturing than to R&D. • Example: management training programs VDAB • State-of-the-art design principles are defined informally and leave room for interpretation • Example: coupling, cohesion, and information hiding

  5. Common Flaws of Methodologies • Most methodologies implicitly lead to a one-to-one functional-to-constructional mapping: • In engineering this mapping is many-to-many: requirements are global constraints for the design • Example: specs vs. parts in a car engine • This creates the evolvability challenge: ever changing requirements imply design for change • Example: upfront design of basic changes • Key design activities/decisions are described informally and left over to individual designers • Example: generalization, granularity

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