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The Evolution of Design Methodologies for GIS

The Evolution of Design Methodologies for GIS. Todd Bacastow January 2009. Tomlinson 1960s – 1980s. Review. Requirements. Req’t vs Constraints. Organization. Comments. Begins with Vision Requirement Driven Linear Req’t vs. Constraints Feedback. Calkins 1970s – 1980s.

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The Evolution of Design Methodologies for GIS

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  1. The Evolution of Design Methodologies for GIS Todd Bacastow January 2009

  2. Tomlinson 1960s – 1980s Review Requirements Req’tvs Constraints Organization

  3. Comments • Begins with Vision • Requirement Driven • Linear • Req’t vs. Constraints • Feedback

  4. Calkins1970s – 1980s Software Analysis and Design Initiation Implementation Performance Hardware Analysis and Design Data Analysis and Design

  5. Comments • Divide • Linear • Incremental • Feedback • Stakeholder participation

  6. Marble and Wilcox 1991

  7. Marble and Wilcox 1991

  8. Marble and Wilcox 1991 Initiation Implementation Design Analysis

  9. Comments • Organizational changes • General to the specific • Best over the ideal • User acceptance

  10. Peuquet & Bacastow 1991 Initiation Design Analysis Design Analysis Implementation

  11. NYS 1997 Analysis Initiation ?? Implementation Design

  12. Comments • Lots of approaches • All have good and bad

  13. Lesson 2 Review Questions • Who are the typical stakeholders in a geospatial system? What are their roles? • Explain why a system owner is particular important to a geospatial system? • What are the differences between the role of system analysts and the role of the rest of the stakeholders? Stephanie Potts • What kind of knowledge and skills should a system analyst possess? • In addition to computing knowledge that system analysts should possess, what are the other essential skills that they need to effectively complete their jobs in geospatial system development? • What are the four steps in Whitten’s system development process? How does this compare to Tomlinson?  J. Earwood • Why is system initiation essential in the system development process? • Why do we need to identify the spatial system architecture?

  14. How are the business perspectives and the technology perspectives of a spatial system related? • Why is an understanding of the system's functions an essential building block of a geospatial information system? m. beckley • What is user’s dialogue? • Why has the inherently natural use of the graphical user interface GUI in geospatial systems complicated the design process for system designers? • Explain why having a standardized system development process is important to an organization performing spatial activities. • How are system life cycle and system development methodology related in spatial system design? • What are the 10 underlying principles for systems development? • Why are process management and project management necessary?

  15. What is risk management? Is this particularly necessary with geospatial design projects? • Which stakeholders initiate most projects? What is the impetus for most geospatial projects? • Who are the main participants in the scope definition in a spatial system? What are their goals in the scope definition? • What are the three most important deliverables in scope definition? • Who are the main participants in the requirements analysis phase when developing a spatial system? Why are they the main participants? • What feasibility analyses are made in the decision analysis? • What is model-driven development? • Why is model-driven development popular? • Give an example of CASE use in GIS development.

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