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.