Struct PertApproximation 

pub struct PertApproximation {
    pub mean_hours: f64,
    pub variance_hours2: f64,
    pub sigma_hours: f64,
    pub path: Vec<WorkItemId>,
    pub activity_variance_hours2: BTreeMap<WorkItemId, f64>,
}

Normal approximation of the project finish along one mean critical path.

Fields

mean_hours: f64

Deterministic project finish in elapsed hours; without calendars it is the sum of the path’s PERT means and lags.

variance_hours2: f64

Sum of the classical PERT variances of the durations the path’s finish depends on. On a calendar these are working hours, not the elapsed hours of mean_hours, so the spread of the elapsed finish is understated and the approximation is more confident still.

sigma_hours: f64

Square root of variance_hours2.

path: Vec<WorkItemId>

The mean critical path from its first activity to the one that sets the project finish.

activity_variance_hours2: BTreeMap<WorkItemId, f64>

Classical PERT variance of every projected activity’s remaining duration: zero for finished or exactly known work, and for started work the range its elapsed time allows.

Implementations

impl PertApproximation

pub fn probability_by(&self, horizon_hours: f64) -> f64

Φ((H − mean) / σ); a path without variance finishes by H exactly when its mean does.

Trait Implementations

impl Clone for PertApproximation

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PertApproximation

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for PertApproximation

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for PertApproximation

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for PertApproximation

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for PertApproximation