/// <summary>
/// Calculate WIP trace and assign WIPin and WIPout qtys to LotActvities
/// </summary>
/// <param name="startDate"></param>
/// <param name="endDate"></param>
public void CalculateWIPTrace(DateTime startDate, DateTime endDate)
{
// Determine begin qty
int beginWIP = LotActivities.Where(x => (x.Arrival == null || x.Arrival < startDate) && (x.Departure == null || x.Departure > startDate)).Count();
WIPTrace.Add(new Tuple <DateTime, int>(startDate, beginWIP));
wipCalculations = new List <Tuple <DateTime, int, LotActivity> >();
// Add arrivals to WIPcalculations
foreach (LotActivity activity in LotActivities.Where(x => x.Arrival != null && x.Arrival >= startDate && x.Arrival <= endDate))
{
wipCalculations.Add(new Tuple <DateTime, int, LotActivity>((DateTime)activity.Arrival, +1, activity));
}
// Add departures to WIPcalculations
foreach (LotActivity activity in LotActivities.Where(x => x.Departure != null && x.Departure >= startDate && x.Departure <= endDate))
{
wipCalculations.Add(new Tuple <DateTime, int, LotActivity>((DateTime)activity.Departure, -1, activity));
}
int currentWIP = beginWIP;
// Order WIP calculations on time
wipCalculations = wipCalculations.OrderBy(x => x.Item1).ToList();
// Loop through arrival and departure events and generate WIP Trace
foreach (Tuple <DateTime, int, LotActivity> calc in wipCalculations)
{
if (calc.Item1 == WIPTrace.Last().Item1)
{
WIPTrace.RemoveAt(WIPTrace.Count() - 1);
}
currentWIP += calc.Item2;
WIPTrace.Add(new Tuple <DateTime, int>(calc.Item1, currentWIP));
// Assign WIPin qty (right before arrival) to LotActivity
if (calc.Item2 == 1)
{
calc.Item3.WIPIn = currentWIP - 1;
}
// Assign WIPout qty (right after departure) to LotActivity
else if (calc.Item2 == -1)
{
calc.Item3.WIPOut = currentWIP;
}
}
// Check if last WIP value is correct
int endWIP = LotActivities.Where(x => (x.Departure == null || x.Departure > endDate) && (x.Arrival == null || x.Arrival < endDate)).Count();
if (endWIP != WIPTrace.Last().Item2)
{
throw new Exception($"End WIP does not match Begin WIP + sum(WIP changes) for {WorkCenter}");
}
wipTraceTimes = WIPTrace.Select(x => x.Item1).ToList();
}
public int GetWIPBeforeTime(DateTime time)
{
if (time > startDate && time <= endDate)
{
int index = WIPTrace.Select(x => x.Item1).ToList().BinarySearch(time);
return(WIPTrace[index - 1].Item2);
}
else if (time == startDate)
{
return(-1);
}
else
{
throw new Exception($"WIP before time {time} is unknown. WIP is only know between {startDate} and {endDate}");
}
}
