public MetricsModel CalculateProjectMetrics(
IEnumerable <ActivityModel> activities,
IEnumerable <ActivitySeverityModel> activitySeverities)
{
if (activities == null)
{
throw new ArgumentNullException(nameof(activities));
}
if (activitySeverities == null)
{
throw new ArgumentNullException(nameof(activitySeverities));
}
var activitySeverityLookup = new ActivitySeverityLookup(activitySeverities);
return(new MetricsModel
{
Criticality = CalculateCriticalityRisk(activities, activitySeverityLookup),
Fibonacci = CalculateFibonacciRisk(activities, activitySeverityLookup),
Activity = CalculateActivityRisk(activities),
ActivityStdDevCorrection = CalculateActivityRiskWithStdDevCorrection(activities),
GeometricCriticality = CalculateGeometricCriticalityRisk(activities, activitySeverityLookup),
GeometricFibonacci = CalculateGeometricFibonacciRisk(activities, activitySeverityLookup),
GeometricActivity = CalculateGeometricActivityRisk(activities),
});
}
private static double CalculateFibonacciRisk(
IEnumerable <ActivityModel> activities,
ActivitySeverityLookup activitySeverityLookup)
{
if (activities == null)
{
throw new ArgumentNullException(nameof(activities));
}
if (activitySeverityLookup == null)
{
throw new ArgumentNullException(nameof(activitySeverityLookup));
}
double numerator = activities.Sum(activity => activitySeverityLookup.FindSlackFibonacciWeight(activity.TotalSlack));
double denominator = activitySeverityLookup.CriticalFibonacciWeight() * activities.Count();
return(numerator / denominator);
}
private static double CalculateGeometricFibonacciRisk(
IEnumerable <ActivityModel> activities,
ActivitySeverityLookup activitySeverityLookup)
{
if (activities == null)
{
throw new ArgumentNullException(nameof(activities));
}
if (activitySeverityLookup == null)
{
throw new ArgumentNullException(nameof(activitySeverityLookup));
}
double numerator = 1.0;
foreach (ActivityModel activity in activities)
{
numerator *= activitySeverityLookup.FindSlackFibonacciWeight(activity.TotalSlack);
}
numerator = Math.Pow(numerator, 1.0 / activities.Count());
double denominator = activitySeverityLookup.CriticalFibonacciWeight();
return(numerator / denominator);
}