WhenToStop Vs. CASRE, Smerfs
WhenToStop Q&A

WhenToStop Frestimate module

Do you need to know whether the software will meet a specific goal on delivery date? This software reliability growth model tool is the only Frestimate component that is used exclusively during software testing or once there are observed failures to:

• Estimate whether or not the required or predicted failure rate or MTTF objective will be met
• Determine the test time and/or defects needed to reach an objective failure rate or MTTF
• Determine When to stop testing given some objective
• Determine the best objective for MTTF or failure rate given resources available
• Filter the catastrophic and critical defects
• Extrapolate the MTTF growth over time
• Determine the growth rate during testing

• Determine the objective MTTF or failure rate given resource constraints
• Determine staff persons needed to correct projected defects

• Determine current failure rate, MTTF and reliability as well as project it into the future given the current trend.

Screen Shots

See what WhenToStop can do for you

• View a walkthru
• What is the difference between software reliability estimation models and prediction models?
• View the WhenToStop tutorial
• View the WhenToStop User's Manual

Key Features

• Ability to import data from other defect tracking software programs
• Easy to use and robust input mechanism for defect data

• Ability to easily extrapolate growth, growth rates, actual and extrapolated MTTFs.
• Graphical results that show you the actual versus predicted, relative error of the prediction and the growth expected
• VERY detailed help files that describe the algorithms and how to interpret your results
• Ability to export all plots to file and to clipboards
• Ability to filter the defects by severity and calculate results only on selected severities
• Detailed and summary reports
• Ability to determine When To Stop testing

Purchasing Requirements

• Requires Windows 2000 or Windows XP
• The Frestimate Manager's Edition