public List <int> CalculateStaff() { var staff = new List <int>(); var lifecycleLabor = CalculateLifecycleLabor(); var lifecycleTime = CalculateLifecycleTime(); for (var i = 0; i < Lifecycle.Count(); ++i) { const double minTime = 1e-5; // ReSharper disable once PossibleInvalidOperationException var st = (int)(lifecycleTime[i] > minTime ? lifecycleLabor[i] / lifecycleTime[i] : 0); staff.Add(st); } return(staff); }