Accession Number:

ADA382590

Title:

Spiral Development: Experience, Principles, and Refinements

Descriptive Note:

Final rept.

Corporate Author:

CARNEGIE-MELLON UNIV PITTSBURGH PA SOFTWARE ENGINEERING INST

Personal Author(s):

• Boehm, Barry
• Hansen, Wilfred J.

Report Date:

2000-07-01

Pagination or Media Count:

47.0

Abstract:

Spiral development is a family of software development processes characterized by repeatedly iterating a set of elemental development processes and managing risk so it is actively being reduced. This paper characterizes spiral development by enumerating a few invariant properties that any such process must exhibit. For each, a set of variants is also presented, demonstrating a range of process definitions in the spiral development family. Each invariant excludes one or more hazardous spiral look-alike models, which are also outlined. This report also shows how the spiral model can be used for a more cost-effective incremental commitment of funds, via an analogy of the spiral model to stud poker. An important and relatively recent innovation to the spiral model has been the introduction of anchor point milestones. The latter part of the paper describes and discusses these.

Descriptors:

• *SOFTWARE ENGINEERING
• *LIFE CYCLE MANAGEMENT
• *PROJECT MANAGEMENT
• OFF THE SHELF EQUIPMENT
• SYSTEMS ANALYSIS
• RISK ANALYSIS

Subject Categories:

• Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE