Risk Analysis Tool

Performing Risk Analysis

Aspose.Tasks for .NET API supports performing risk analysis on a Project data file. This is based on the Monte Carlo simulation that supports different probability distributions and correlations. The Aspose.Tasks.RiskAnalysis.RiskAnalyzer class can be used to perform the risk analysis that is based on a project schedule (task durations and their start/finish dates). So, a project Finish date can be the output of such analysis. The following example illustrates this functionality step-by-step.

Performing Risk Analysis

Preparing Analysis Settings

RiskAnalysisSettings settings = new RiskAnalysisSettings();

// Set number of iterations for Monte Carlo simulation (the default value is 100).
settings.IterationsCount = 200;

Identifying the Input of Analysis

Project project = new Project("New Project.mpp");
Task task = project.RootTask.Children.GetById(17);

// Initialize a risk pattern
RiskPattern pattern = new RiskPattern(task);

// Select a distribution type for the random number generator to generate possible values from (only two types currently supported, namely normal and uniform)
// For more details see here: https://en.wikipedia.org/wiki/Normal_distribution)
pattern.Distribution = ProbabilityDistributionType.Normal;

// Set the percentage of the most likely task duration which can happen in the best possible project scenario 
// The default value is 75, which means that if the estimated specified task duration is 4 days then the optimistic duration will be 3 days
pattern.Optimistic = 70;

// Set the percentage of the most likely task duration which can happen in the worst possible project scenario 
// The default value is 125, which means that if the estimated specified task duration is 4 days then the pessimistic duration will be 5 days.
pattern.Pessimistic = 130;

// Set a confidence level that correspond to the percentage of the time the actual values will be within optimistic and pessimistic estimates. 
// You can think of it as a value of standard deviation: the more uncertain about your estimates you are, the more the value of standard deviation used in random number generator is
pattern.ConfidenceLevel = ConfidenceLevel.CL75;

settings.Patterns.Add(pattern);

// Analyze the project risks
RiskAnalyzer analyzer = new RiskAnalyzer(settings);
RiskAnalysisResult analysisResult = analyzer.Analyze(project);

Use the Results of the Analysis

// Select the desired output (here we get early finish of the root task)
RiskItemStatistics rootEarlyFinish = analysisResult.GetRiskItems(RiskItemType.EarlyFinish).Get(project.RootTask);
Console.WriteLine("Expected value: {0}", rootEarlyFinish.ExpectedValue);
Console.WriteLine("StandardDeviation: {0}", rootEarlyFinish.StandardDeviation);
Console.WriteLine("10% Percentile: {0}", rootEarlyFinish.GetPercentile(10));
Console.WriteLine("50% Percentile: {0}", rootEarlyFinish.GetPercentile(50));
Console.WriteLine("90% Percentile: {0}", rootEarlyFinish.GetPercentile(90));
Console.WriteLine("Minimum: {0}", rootEarlyFinish.Minimum);
Console.WriteLine("Maximum: {0}", rootEarlyFinish.Maximum);
analysisResult.SaveReport("AnalysisReport_out.pdf");