The spiral model is a procedural model in the software development, which was described in the year 1978 by Barry W. Boehm. It is open for procedural models already existing. The management can intervene again and again, since one develops spiral in front.

The spiral model understands the development development of software engineering as iterative process, whereby each cycle contains the following activities (see diagram):

1. Definition of goals, alternatives and basic conditions
2. Evaluation of the alternatives and recognizing and reduction of risks
3. Realization and examination of the intermediate product
4. Planning of the project continuation.

At the end each turn of the spiral stands regarding the project progress (English Review). Also the project continuation is planned and discharged.

The spiral model is called in the software development also incremental and iterative procedural model. It is an advancement of the water drop model, in which the phases will several times spiral go through.

The incremental and iterative procedural model plans therefore a cyclic repetition of the individual phases of the water drop model. The project approaches slowly the goals on, even if the goals change during the project progress. After Boehm the risk of a failure is crucially minimized by the spiral model with large software projects.

The spiral model (is Meta model) divides into partial products, for everyone:

Goals specify, to boundary conditions describe, alternatives look for alternatives evaluate, risks measure processing concept specify next cycle plan

See also

• Generik

Related links

• Description of the spiral model and biography Barry W. Boehms

Articles in category "Spiral model"

We found here 3 articles.

Related Websites

We found here 4 related websites.

• A spiral model of software development and enhancement - Computer
  Page 1. Page 2. Page 3. Page 4. Page 5. Page 6. Page 7. Page 8. Page 9. Page 10. Page 11. Page 12.


• Define spiral model - a definition from Whatis.com
  The spiral model, also known as the spiral lifecycle model, is a systems development method (SDM) used in information technology (IT).


• Spiral model - Wikipedia, the free encyclopedia
  The spiral model was defined by Barry Boehm in his article A Spiral Model of Software Development and Enhancement from 1985. This model was not the first ...


• What's the 'spiral model'
  Date: 10 Oct 1998 Archive file: spiral (1) Barry Boehm, "A Spiral Model of Software Development and Enhancement", ACM SIGSOFT Software Engineering Notes, ...