/// <summary>
/// An algorithm for capacity-leveling. Writes Start/End in ProductionOrderWorkSchedule.
/// </summary>
public void GifflerThompsonScheduling(int simulationId)
{
var notplanned = new List <ProductionOrderWorkSchedule>();
// Datenbank.Collection.Methode(collection => collection.field == parameter).Field
//.Single Return an Object instead of an Collection of that requested Object.
var currentTime = _context.SimulationConfigurations.Single(a => a.Id == simulationId).Time;
//var productionOrderWorkSchedules = GetProductionSchedules(simulationId);
var productionOrderWorkSchedules = _context.ProductionOrderWorkSchedules.Where(a => a.ProducingState == ProducingState.Created).ToList();
productionOrderWorkSchedules = ResetStartEnd(productionOrderWorkSchedules);
productionOrderWorkSchedules = CalculateWorkTimeWithParents(productionOrderWorkSchedules);
var plannableSchedules = new List <ProductionOrderWorkSchedule>();
var plannedSchedules = new List <ProductionOrderWorkSchedule>();
GetInitialPlannables(productionOrderWorkSchedules, plannedSchedules, plannableSchedules);
while (plannableSchedules.Any())
{
//find next element by using the activity slack rule
//Todo: Remove after testing
//var shortest = GetHighestPriority(plannableSchedules);
CalculateActivitySlack(plannableSchedules, currentTime);
var shortest = GetShortest(plannableSchedules);
plannableSchedules.Remove(shortest);
//Add a fix spot on a machine with start/end
AddMachine(plannedSchedules, shortest, currentTime);
plannedSchedules.Add(shortest);
//search for parents and if available and allowed add it to the schedule
var parents = _context.GetParents(shortest);
foreach (var parent in parents)
{
if (!plannableSchedules.Contains(parent) && IsTechnologicallyAllowed(parent, plannedSchedules))
{
plannableSchedules.Add(parent);
}
_context.SaveChanges();
}
}
if (productionOrderWorkSchedules.Count() != plannedSchedules.Count())
{
notplanned = productionOrderWorkSchedules.Where(pows => !plannedSchedules.Contains(pows)).ToList();
}
}
private void FillSimulationWorkSchedules(List <PowsSimulationItem> items, int simulationId, int simulationNumber, MrpTask task)
{
foreach (var item in items)
{
var po = _context.ProductionOrders.Include(b => b.Article).Single(a => a.Id == item.ProductionOrderId);
var pows = _context.ProductionOrderWorkSchedules.Single(a => a.Id == item.ProductionOrderWorkScheduleId);
if (task == MrpTask.None)
{
var schedule = new SimulationWorkschedule()
{
ParentId = JsonConvert.SerializeObject(from parent in _context.GetParents(pows) select parent.Id),
ProductionOrderId = "[" + po.Id.ToString() + "]",
Article = po.Article.Name,
DueTime = po.Duetime,
End = pows.EndSimulation,
EstimatedEnd = pows.End,
EstimatedStart = pows.Start,
HierarchyNumber = pows.HierarchyNumber,
Machine = pows.MachineId == null ? null : _context.Machines.Single(a => a.Id == pows.MachineId).Name,
Start = pows.StartSimulation,
OrderId = JsonConvert.SerializeObject(_context.GetOrderIdsFromProductionOrder(po)),
SimulationConfigurationId = simulationId,
WorkScheduleId = pows.Id.ToString(),
WorkScheduleName = pows.Name,
SimulationType = SimulationType.Central,
SimulationNumber = simulationNumber,
};
_context.Add(schedule);
//_evaluationContext.Add(schedule.CopyDbPropertiesWithoutId());
}
if (task == MrpTask.Backward || task == MrpTask.All)
{
var backward = new SimulationWorkschedule()
{
ParentId = JsonConvert.SerializeObject(from parent in _context.GetParents(pows) select parent.ProductionOrderId),
ProductionOrderId = "[" + po.Id.ToString() + "]",
Article = po.Article.Name,
DueTime = po.Duetime,
End = pows.EndBackward,
HierarchyNumber = pows.HierarchyNumber,
Start = pows.StartBackward,
OrderId = JsonConvert.SerializeObject(_context.GetOrderIdsFromProductionOrder(po)),
SimulationConfigurationId = simulationId,
WorkScheduleId = pows.Id.ToString(),
WorkScheduleName = pows.Name,
SimulationType = SimulationType.BackwardPlanning,
SimulationNumber = simulationNumber,
Machine = pows.MachineGroupId.ToString()
};
_context.Add(backward);
_evaluationContext.Add(backward.CopyDbPropertiesWithoutId());
}
if (task == MrpTask.Forward || task == MrpTask.All)
{
var forward = new SimulationWorkschedule()
{
ParentId = JsonConvert.SerializeObject(from parent in _context.GetParents(pows) select parent.ProductionOrderId),
ProductionOrderId = "[" + po.Id.ToString() + "]",
Article = po.Article.Name,
DueTime = po.Duetime,
End = pows.EndForward,
HierarchyNumber = pows.HierarchyNumber,
Start = pows.StartForward,
OrderId = JsonConvert.SerializeObject(_context.GetOrderIdsFromProductionOrder(po)),
SimulationConfigurationId = simulationId,
WorkScheduleId = pows.Id.ToString(),
WorkScheduleName = pows.Name,
SimulationType = SimulationType.ForwardPlanning,
SimulationNumber = simulationNumber,
Machine = pows.MachineGroupId.ToString()
};
_context.Add(forward);
_evaluationContext.Add(forward.CopyDbPropertiesWithoutId());
}
}
_context.SaveChanges();
_evaluationContext.SaveChanges();
}