Ca chap 13 standard costing&variance analysis(2)Presentation Transcript
Standard Costing And Variance Analysis Chapter 13
Standard costing is a technique which is used in many industries, where production is of repetitive nature.
Standard costing is developed due to the shortcomings of historical costing.
CIMA, London, defines standard costing ‘as the predetermined cost based on technical estimates of materials, labour and overheads for selected period of time and for the prescribed set of working conditions’.
Standard costing is that technique in which the standard cost is determined before starting the production.
Standard cost is a predetermined cost and such cost indicates what a product should cost.
Standard cost is calculated by considering all the situations ideal in nature.
Standard costs have been defined as the normal costs for normal production efficiency at normal level of output.
The word standard means a criterion (principle,measure).
A standard figure is one against which one can measure an actual figure to see the deviation.
Standard cost is ‘a predetermined cost which is compared in advance of production on the basis of specifications of all the factors affecting costs and used in standard costing.’
In other words, standard cost is a predetermined cost that should be attained under a given set of operating conditions.
Objectives Of Standard Costing
To establish control
To set standards for various elements of cost
To fix responsibility
To make budgetary control more effective
Establishing A System Of Standard Costing
Setting up cost centers
Classification of accounts
Determination of size of the standard
Setting up of standard
Standard cost card
Need For Standards
Management by objective
Application Of Standard Costing
Advantages Of Standard Costing
Formulation of price and production policies
Comparison and analysis of data
Management by exception
Delegation of authority and responsibility
Better capacity to anticipate
Better economy, efficiency, and productivity
Preparation of periodical financial statements
Limitations Of Standard Costing
high degree of technical skill
segregation of variances into controllable and non-controllable factors
duplication in recording,
either too strict or too liberal.
The deviation of actual from standard is called variance.
When the actual cost is less than standard cost or actual result is better than standard set, it is known as favourable variance.
On the other hand, when actual cost exceeds standards cost or actual result is not up to standard, it is known as unfavourable or adverse variance.
Classification Of Variances
Absolute variance: Difference between the standard cost and the actual cost in terms of money is known as absolute variance.
Relative variance: difference is expressed as a percentage of the standard cost, it is known as relative variance.
Material cost variance
Material cost variance = (Standard quantity of input for actual production × SP) – (Actual quantity of input × AP)
Material cost variance = Material price variance + Material usage variance
Material price variance
This is that portion of the material cost variance which is due to the difference between the standard price specified and the actual price paid.
If the actual price is higher than the standard price, it would result in adverse price variance and if the actual price is lower than standard price, the result is favourable price variance.
Material price variance = Actual quantity (Standard price – Actual price)
Material Usage Variance
This is that portion of material cost variance which is due to the difference between the standard quantity of actual production and the actual quantity used.
Material Usage Variance = Standard price (Standard quantity – Actual quantity)
Material Mixture Variance
This is that portion of usage variance which is due to the difference between the standard and actual composition of mixture.
Material Mixture Variance = Standard price [Actual quantity in standard mix (i.e. RSQ) – Actual quantity]
Revised Standard quantity = Total actual quantity consumed ×
Material Yield Variance
When there is a loss in process industries, the material yield variance can be calculated.
This variance arises due to the difference between the standard yield specified and actual yield obtained.
This is also a portion of the material usage variance.
Material yield variance = [(Standard loss in terms of actual input) – (Actual loss on actual input)] × (Average standard price)
Material yield variance = Material usage variance – Material mix variance
Material Sub-usage Variance
When a product is produced from a mixture of two or more kinds of material, there may arise material sub-usage variance.
There can be two possibilities:
Total quantity of material consumed and standard quantity are not equal, and mix ratios are also different.
Total quantity of material consumed and standard quantity are not equal, but mix ratios are equal.
It should be noted that material sub-usage variance is calculated only when the quantity of wastage or output is not given.
When these quantities are given, this variance will be the same as material yield variance.
This variance is also known as material revised usage variance or material quantity variance.
Material sub-usage variance = (SQ – RSQ) × SP
It can be seen from this formula that material sub-usage variance is the analysis of variance in basic standard quantity of each material.
Labour Rate Variance
This is that portion of the labour cost variance which is caused by the use of actual wage rate other than predetermined.
Labour rate variance = Actual labour time (Standard wage rate – Actual wage rate)
Labour Efficiency Variance
It is the difference between the standard time and the actual time spent multiplied by standard wage rate.
Labour efficiency variance = Standard wage rate (Standard labour time – Actual labour time)
Labour Idle Time Variance
It is that portion of labour cost variance which is due to the abnormal idle time of workers.
While calculating labour efficiency variance, abnormal idle time is deducted from the actual time spent to determine the real efficiency of the workers.
Idle time variance = Abnormal idle time × Standard wage rate
Labour Yield Variance
It is computed on the basis of the increase or decrease in the actual yield or output when compared to the standard.
Labour Yield Variance = [Standard yield in units expected from the actual hours worked – actual yield] × Standard labour cost per unit
Labour Mix Variance
This variance arises due to the change in the composition or mix of a group of workers as compared to the standard composition or mix.
It can be calculated in the following two situation:
When the totals of standard labour mix and actual labour mix are same, but the two mix ratios are different.
When the totals of standard labour mix and actual labour mix are different, and the two mix ratios are also different.
Labour mix variance = (Standard time mix – Actual time mix) × Standard rate per hour
Labour mix variance = (Revised standard time – Actual time) × Standard rate per hour
Here, RST= Total actual time ×
Variable overhead variance
Difference between the standard variable overheads and absorbed variable overheads is called variable overhead variance.
If variable overhead absorbed to actual output is more or less than its standard variable overhead, this variance is created.
Overhead variance is the difference between the amount calculated at standard rate of variable overhead and the amount calculated at actual rate of variable overhead on the on the actual output.
Variable overhead variance = AO (SR – AR)
= (AO × SR) – (AO × AR)
= SVO – AVO
Here, AO = Actual output, SR = Standard rate,
AR = Actual rate,
SVO = Standard variable overhead, and
AVO = Actual variable overhead
Net or overall variable overhead variance
Variable overhead variance =
[Standard hours × Standard variable overhead rate per hour] – [Actual hours × Actual variable overhead rate per hour]
= [SH × SVOR] – [AH × AVOR]
This net variable overhead variance can be decomposed into following two variances:
Variable overhead spending variance
Variable overhead efficiency variance
Variable overhead spending variance (VOSV)
VOSV = (Actual hours × Standard variable overhead rate per hour)
- (Actual hours × Actual variable overhead rate per hour)
Variable overhead efficiency variance (VOEV) :
The difference between the actual hours used to complete a job and the standard hours allowed to do it indicates the efficiency or inefficiency.
It measures the extent of cost saved or excess cost incurred due to efficient or inefficient performance.
VOEV = (Standard hours allowed for actual volume or output –
Actual hours taken for actual volume) ×
Standard variable overhead rate per hour
= (Actual output hours × Standard per unit) –
(Actual hours × Standard variable overhead recovery rate)
The variable overhead can be attributed to the causes which are responsible for the labour efficiency variance.
Factors such as workers’ personal problems, incentive plans, work process, frequency and quantity of machine repairs, materials quantity, etc. will cause variable overhead efficiency variance.
Variable overhead expenditure variance
Variable overhead expenditure variance =
Budgeted variable overheads – Actual variable overheads
Fixed overhead variance
Fixed overhead variance is mainly concerned with over – absorption or under – absorption on fixed overheads.
As the fixed overheads are not affected by the volume of output, its absorption is done on actual output the predetermined rate only.
Fixed overhead variance is caused due to the difference between standard fixed overhead and actual fixed overhead on actual output.
Fixed overhead variance = TSC – TAC
[AO × SFO] – [ AO × AFO]
TSO – TAO
Here, TSC = Total standard cost for actual output,
TAC = Total actual cost,
AO = Actual output
SFO = Standard fixed overhead
AFO = Actual fixed overhead
TSO = Total standard overhead
TAO = Total actual overhead
The difference between the amount actually spent during a certain period as fixed overhead and the amount of fixed overhead budgeted for the period is expressed by this variance.
This part of fixed overhead cost variance shows whether the actual amount of fixed overhead is less or more than the amount budgeted for it.
Expenditure variance =
Budgeted fixed overhead – Actual fixed overhead
Volume variance is caused mainly due to the difference between budgeted output and actual output.
To calculate this variance, the difference of budgeted output and actual output is multiplied by the budgeted standard absorption rate.
Volume variance = SC (AQ – BQ)
Where, SC = Standard cost per unit of fixed overheads
AQ = Actual output in actual hours worked
BQ = Budgeted standard output in budgeted standard hours
This variance gives information about the efficiency of workers because it arises due to their being less or more efficient.
It also arises due to the change in production process or quality of material and efficiency of the machinery, plant, and workers.
Efficiency variance = SC (AQ – SQ)
Here, SQ means the quantity produced during actual working hours at the standard rate.
Capacity is expressed in terms of average direct labour hours per day.
If capacity is utilized to a level less or more than the planned standard, variance arises.
Use of plant and instruments less or more than their capacity affects the efficiency due to which this variance arises.
Capacity variance = SC (SQ – BQ)
If the number of actual working days during a certain period is different from the standard number of working days during the same period, then it is called calendar variance.
Calendar variance = SC (RBQ – BQ)
Here, RBQ = Budgeted quantity of output for actual working days.
If the calendar variance is being calculated, capacity variance should be ascertained using the formula given below:
Capacity variance = SC (SQ – RBQ)
Sales Value Variance
It is the difference between the standard value and the actual value of sales affected during a period.
Sales value variance =
Actual value of sales – Standard value of sales
Sales price variance
It is the portion of the sales value variance which is due to the difference between actual price and standard price specified.
Sales price variance =
Actual quantity sold × (Actual price – Standard price)
Sales Volume Variance
It is the portion of the sales value variance which is due to the difference between actual quantity of sales and standard quantity of sales.
Sales Volume Variance = Standard price × (Actual quantity of sales – Standard quantity of sales)
Sales mix variance :
It is the part of the sales volume variance and it arises due to the difference in the proportion in which various articles are sold and standard proportion in which various articles were to be sold.
Sales mix variance = Standard value of actual mix – Standard value of revised standard mix
Sales Sub – Volume Variance :
This represents the difference between the budgeted sales. It is also called as sales quantity variance.
Sales Sub – Volume Variance = (Revised standard sales quantity × Standard selling price) – (Standard sales quantity × Standard selling price)
Variances Based On Profits
Total sales margin variance :
This is an overall or composite variance made of other sub-variances, and is represented by the difference between the standard margin appropriate to the quantity of sales budgeted for a period and the margin between standard cost and actual selling price of the sales affected.
Total sales margin variance =
Standard or Budgeted margin – Actual margin
Sales margin variance due to the selling price
This is that portion of total margin variance which is due to the difference between the standard price on the quantity of sales affected and the actual price of those sales.
Sales price variance =
(Actual quantity of sales × Standard price) –
(Actual quantity of sales × Actual price)
Sales price variance =
Profit on actual sales at standard price and standard cost – Actual profit
Sales margin variance due to the volume of sales
This is that portion of total margin variance which is due to the difference between the budgeted quantity and the actual quantity of sales.
The variance is composed of two sub-variances, due to change in the ratio of quantities of sales (mix variance) and actual being more or less than the budgeted sales (quantity variance).
Sales volume variance = Standard profit on standard quantity of sales – Standard profit on actual quantity of sales
Sales volume variance = Standard profit – profit on actual sales at standard price and standard costs
Sales margin variance due to sales mixture
This is that portion of total margin variance which is due to the difference between the budgeted and actual quantities of each product of which the sales mixture is composed, valuing sales standard net selling prices and cost of sales at standard.
Sales mixture variance = Standard margin × (Standard proportion for actual sales – Actual proportion)
Sales mixture variance = Standard sales unit × (weighted budgeted margin per unit – Margin of actual sales units at standard price)
Sales margin variance due to sales quantities
This is that portion of the sales volume variance which arises due to the difference in the total actual and the budgeted sales.
Sales quantity variance = Standard margin × (Budgeted sales – Standard proportion for actual sales)
Efficiency ratio is the standard hour’s equivalent to the work produced, expressed as percentage of the actual hours spent in producing that work.
This is related to the labour efficiency and variable overheads/fixed overheads efficiency variance
Efficiency ratio = ×100
Activity ratio is the number of standard hour’s equivalent to the work produced, expressed as a percentage of the budgeted standard hours.
This ratio is related to the fixed overhead volume variance.
Activity ratio = × 100
Calendar ratio is the relationship between the number of working days in a period and the number of working days in the relative budget period.
Calendar ratio =
Capacity usage ratio
Capacity usage ratio is the relationship between the budgeted number of working hours and the maximum possible number of working hours in the budget period.
Capacity usage ratio =
Capacity utilization ratio
Capacity utilization ratio is the relationship between the actual hours in a budget period and the budgeted working hours in a given period.
This ratio is related to fixed overhead capacity variance.