Predictions Vs. Casre & Smerfs

Predictions Vs. Casre & Smerfs

Alternatives for software reliability prediction

Desired Feature	CASRE, SMERFS	Prism	Frestimate
Supports both software reliability prediction models and estimation models	No. Supports only estimation models which are used only after testing has started.	No. Supports prediction model but not estimation.	Yes. Has prediction models that can be used before testing. Also has estimation models in the WhenToStop module that can be used during testing. You can use one software package from concept to delivery.
Supports multi-parameter prediction models	No.	No. The model included is a single parameter model.	Yes. Multi-parameter models are generally more accurate then single parameter models. Frestimate also has 2 single parameter models in the event that you are short on available data.
Compares your results with other projects that are similar in application, SEI CMM level	No.	No.	Yes.
Has wizards to help you understand your inputs and outputs	No.	No.	Yes.
Measures the three P's Process, People and Product	No.	Not all of the P's are measured directly	Yes.