clipped-drh-callout.ts

function deriveRunnerLaborHours(pred: CapacityPreds, max_callout_rate: number) {
  if (pred.runner_hours_predicted === 0) {
    return { finalCapacity: 0 }
  }

  let predictedDrhWithLimits: number = null

  if (pred.drh_predicted < MIN_DRH) {
    predictedDrhWithLimits = MIN_DRH
  } else if (pred.drh_predicted > MAX_DRH) {
    predictedDrhWithLimits = MAX_DRH
  } else {
    predictedDrhWithLimits = pred.drh_predicted
  }

  const baseRunnerHoursForecasted =
    pred.demand_predicted / predictedDrhWithLimits

  const calloutRate = Math.min(max_callout_rate, pred.predicted_callout)

  const runnerHoursForecastedWithCallout =
    baseRunnerHoursForecasted / (1 - calloutRate)

  const capacityNeededWithCalloutsRoundedToNextInteger = Math.ceil(
    runnerHoursForecastedWithCallout
  )

  const finalCapacity = Math.max(
    MIN_RUNNER_PER_HOUR,
    capacityNeededWithCalloutsRoundedToNextInteger
  )

  // console.log(pred.datetime, baseRunnerHoursForecasted, finalCapacity)

  return {
    baseRunnerHoursForecasted,
    calloutRate,
    runnerHoursForecastedWithCallout,
    capacityNeededWithCalloutsRoundedToNextInteger,
    finalCapacity,
  }
}