116 Part II: Planning Your Software (Web site design and hosting) Project Table
116 Part II: Planning Your Software Project Table 5-1 Sample Qualitative Risk Impact Matrix Risk Probability Impact Risk Score Server crashes Low Medium Low Lack of developers High Medium High Firmware changes Low Medium Low Requirement to install service packs High Medium Medium Meteorites strike company Low Low Low headquarters As you can probably guess, rating impact can be a subjective process, but as long as you re not doing your risk assessment in a vacuum, the subjectivity isn t likely to bring your project down. Calm down; you re probably safe. With the help of your team members to assign the probability and impact, you can apply multiple perspectives in your rankings. There s not a ton of proof that any of these risks are more or less likely to occur, but don t underestimate the experience of project team members and stakeholders. Prepare for some heated discussions on why a risk is rated Medium instead of High. Remind the participants that this is only the first round of risk analysis and that scores can change. When everyone agrees on the ranking of each of the risks, you must determine which risks are small enough to accept and which risks need more analysis. Usually risks with a medium or greater ranking qualify for quantitative analysis. Relying on Quantitative Analysis Quantitative analysis is the process of measuring your risk exposure. Quantification requires more than going with your gut feeling; you need to conduct interviews, set up prototypes, do expert analysis, and set up simulations. As you can guess, quantitative analysis takes time and usually some investment. Someone has to interview the stakeholders. Someone has to create the prototype, the simulations, and complete the analysis. Some stakeholders, customers, and project managers are likely to argue against completing a
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