CalculationPost-calculation: Standard vs. Actual
Post-calculation: Standard vs. Actual
Compares pre-calculation and order actuals and shows deviations in time and currency by cause.
How to use the result
Compare only like with like: the same drawing revision, operation, and time definition. If feedback includes disruptions and auxiliary work that were not planned, the reported variance will be overstated.
Only an incorrect costing assumption justifies changing the costing basis. Disruptions and data errors belong in the correction of feedback, not the next calculation.
A small percentage variance can almost eliminate the contribution margin. Assess it in euros and by how often the order recurs.
Formulas
direct cost = material + (setup time + quantity · cycle time) / 60 · rate + subcontracting cost + one-time costcost variance = actual cost − planned costvolume variance = (produced parts − planned parts) · planned cost per partcycle-time variance = produced parts · (actual cycle time − planned cycle time) / 60 · rateperformance rate = standard time for the produced quantity / actual timecontribution margin = revenue − direct cost Sources: REFA methods (performance rate, plan-versus-actual comparison); Planned-cost variance analysis according to standard managerial accounting practice