Get

RiskItemStatisticsCollection.Get method

Returns an instance of the RiskItemStatistics class containing in this collection which is associated with the specified Task object; null if the item is not found.

public RiskItemStatistics Get(Task task)
Parameter Type Description
task Task the specified instance of the Task class.

Return Value

risk item which is associated with the specified task object if found; null otherwise.

Examples

Shows how to work with collection of risk statistics.

var settings = new RiskAnalysisSettings
{
    IterationsCount = 200
};

var project = new Project(DataDir + "Software Development Plan-1.mpp");
var task = project.RootTask.Children.GetById(17);

// Initialize a risk pattern
var 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)
    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
    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.
    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
    ConfidenceLevel = ConfidenceLevel.CL75
};
settings.Patterns.Add(pattern);

var analyzer = new RiskAnalyzer(settings);
var analysisResult = analyzer.Analyze(project);

// iterate over all statistic items
var statistics = analysisResult.GetRiskItems(RiskItemType.EarlyFinish);

foreach (var statistic in statistics)
{
    Console.WriteLine("Short statistic: " + statistic);
    Console.WriteLine();
    Console.WriteLine("Statistic details: ");
    Console.WriteLine("Item Type: {0}", statistic.ItemType);
    Console.WriteLine("Expected value: {0}", statistic.ExpectedValue);
    Console.WriteLine("StandardDeviation: {0}", statistic.StandardDeviation);
    Console.WriteLine("10% Percentile: {0}", statistic.GetPercentile(10));
    Console.WriteLine("50% Percentile: {0}", statistic.GetPercentile(50));
    Console.WriteLine("90% Percentile: {0}", statistic.GetPercentile(90));
    Console.WriteLine("Minimum: {0}", statistic.Minimum);
    Console.WriteLine("Maximum: {0}", statistic.Maximum);
}

// or get a specific stats
var itemStatistics = analysisResult.GetRiskItems(RiskItemType.EarlyFinish).Get(project.RootTask);

Console.WriteLine("Print the specific statistic: ");
Console.WriteLine("Expected value: {0}", itemStatistics.ExpectedValue);
Console.WriteLine("StandardDeviation: {0}", itemStatistics.StandardDeviation);
Console.WriteLine("10% Percentile: {0}", itemStatistics.GetPercentile(10));
Console.WriteLine("50% Percentile: {0}", itemStatistics.GetPercentile(50));
Console.WriteLine("90% Percentile: {0}", itemStatistics.GetPercentile(90));
Console.WriteLine("Minimum: {0}", itemStatistics.Minimum);
Console.WriteLine("Maximum: {0}", itemStatistics.Maximum);

See Also