WinWin Spiral Model

(Additions to the spiral model shown in bold.)

Typical Cycle of the WinWin Spiral

• Identify the system or subsystem's key stakeholders.
  
  
• Identify the stakeholders' win conditions for the system or subsystem.
  
  
• Negotiate win-win reconciliations of the stakeholders' win conditions.
  
  
• Elaborate the system or subsystem's product and process objectives, constraints, and alternatives.
  
  
• Evaluate the alternatives with respect to the objectives and constraints. Identify an dresolve major sources of product and process risk.
  
  
• Elaborate the definition of the product and process.
  
  
• Plan the next cycle, and update the life-cycle plan, including partition of the system into subsystems to be addressed in parallel cycles. This can include a plan to terminate the project if it is too risky or infeasible. Secure the management's commitment to proceed as planned.

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