its inputs, outputs and actions. Following we show the detailed
comparison of each phase of the models.
Comparison Between Objectives Phase
Differences in the inter-component dependency: Comparing the
inputs of Software_Project_Objectives of the Waterfall Model and
Establish_Objectives of the Spiral Model we verified that an input
does not exist in the Waterfall Model. That shows that the model
does not have a specific phase that treats the customer's needs.
Therefore, it suggests that the inputs for the event to
Software_Project_Objectives are collected spontaneously.