Category Archives: Uncategorized

Mars Polar Lander bug – requirement or code problem

In 2000, I used model-based testing to identify the bug that was the likely cause of the Mars Polar Lander (MPL) crash. See “Mars Polar Lander Fault Identification Using Model-based Testing” for additional detail. The question came up as to … Continue reading

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Estimation Issues – Part 2: Interface-driven Requirements

In Part 1 of Estimation Issues, I discussed issues that often surface during program area analyses. We have seen on several programs that inadequate estimation of the size of the effort is a common problem, which impacts the cost, schedule … Continue reading

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Engineering Analytics – Improving Cycle-time Prediction

You have probably heard of business analytics, which involves continuous iterative exploration and investigation of past business performance to gain insight and drive business planning. Engineering analytics is similar, but focused on engineering performance, and in this case prediction and … Continue reading

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Estimation Issues – Part 1: Diseconomies of Scale

We often perform program area analyses, where we work with clients to understand issues and ultimately trace the issues to root causes that negatively impact their program performance. One issue that we have seen on several programs is inadequate estimation … Continue reading

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