US CMA PART 1 – Standard Costing & Variance Analysis – Notes
US CMA PART 1 – Standard Costing & Variance Analysis – Notes
#### 1. Fundamentals
- Standard Cost = Predetermined cost allowed for actual output under efficient conditions.
- Variance = Actual – Standard / Budget. Always flex standard to ACTUAL OUTPUT.
- Golden Rule: Distinguish AQ Purchased vs AQ Used vs SQ Allowed for actual output.
*F / U Logic*
- Cost: Actual > Standard = U. Actual < Standard = F.
- Revenue / CM: Actual > Standard = F. Actual < Standard = U.
- F does not always mean good. Example: Cheap material = F price but U usage + U labor efficiency.
#### 2. Direct Materials
*Price Variance* = (AP - SP) x AQ Purchased
If question says recognized at use, use AQ Used. Follow question instruction.
*Quantity / Usage Variance* = (AQ Used - SQ Allowed) x SP
SQ = Standard qty per unit x Actual output.
*Total Material Variance* = (AQ Used x AP) - (SQ Allowed x SP)
If price variance uses Purchased qty, Price + Usage will NOT reconcile due to inventory change – Exam Trap.
#### 3. Direct Labor
*Rate Variance* = (AR - SR) x AH
*Efficiency Variance* = (AH - SH) x SR
SH = Standard hours per unit x Actual output
*Total Labor Variance* = Rate + Efficiency
Interdependence: Poor material quality → U material usage + U labor efficiency.
#### 4. Variable Overhead – MUST KNOW
SVOR = Standard Variable Overhead Rate per hour
AVOHR = Actual VOH Rate
*VOH Spending Variance* = Actual VOH - (AH x SVOR) = (AVOHR - SVOR) x AH
*VOH Efficiency Variance* = (AH - SH) x SVOR
*Total VOH Variance* = Actual VOH - (SH x SVOR) = Spending + Efficiency
Reason: Spending = over/under spent for hours worked. Efficiency = effect of working more/less hours.
#### 5. Fixed Overhead – MUST KNOW
Budgeted FOH = Fixed overhead budgeted for period
SFOR = Standard Fixed Overhead Rate = Budgeted FOH / Denominator hours or units
Applied FOH = SH x SFOR
*FOH Spending / Budget Variance* = Actual FOH - Budgeted FOH
*FOH Production Volume Variance* = Budgeted FOH - Applied FOH = Budgeted FOH - (SH x SFOR)
Volume variance is CAPACITY variance, not spending control. If Actual output < Denominator = U (under-applied). If Actual output > Denominator = F.
*Never confuse FOH Volume with VOH Efficiency.*
#### 6. Overhead Analysis – 2-Way, 3-Way, 4-Way – ADDED TOPIC – HIGHLY TESTED
This is for TOTAL Factory Overhead (VOH + FOH)
Let:
Budgeted VOH = SVOR x Denominator Hours OR Budgeted hours? For flex budget, use: Budgeted FOH + (SVOR x SH) or (SVOR x AH) depending on variance.
*Most Tested Method as per IMA / Gleim / Hock:*
*A. 2-Way Analysis:*
1. Budget (Controllable) Variance = Actual Total OH - Budgeted Total OH for SH
Budgeted for SH = Budgeted FOH + (SVOR x SH)
2. Volume Variance = Budgeted Total OH for SH - Applied Total OH
Applied = SH x Total Std Rate = SH x (SVOR+SFOR)
OR simply = FOH Volume variance (VOH has no volume variance)
2-Way: Budget Variance shows spending + efficiency combined. Volume shows capacity.
*B. 3-Way Analysis:*
1. Spending Variance = Actual Total OH - Budgeted Total OH for AH
Budgeted for AH = Budgeted FOH + (SVOR x AH)
2. Efficiency Variance = (AH - SH) x SVOR (This is ONLY VOH Efficiency)
3. Volume Variance = Budgeted FOH - Applied FOH (Same as FOH Volume)
3-Way Check: Total Overhead Variance = Spending + Efficiency + Volume
*C. 4-Way Analysis – Most Detailed:*
1. VOH Spending Variance = Actual VOH - (AH x SVOR)
2. VOH Efficiency Variance = (AH - SH) x SVOR
3. FOH Spending Variance = Actual FOH - Budgeted FOH
4. FOH Volume Variance = Budgeted FOH - (SH x SFOR)
4-Way: Total OH Variance = 1+2+3+4
*Exam Trick:* If question gives combined overhead rate, split it into VOH and FOH rates first.
#### 7. Material Mix & Yield Variances – You are correct
When product uses 2+ materials:
Total Input = Sum of actual quantities of all materials
RSQ = Revised Standard Qty = Actual Total Input x Standard Mix %
*Mix Variance* = Σ (AQ - RSQ) x SP
F/U depends on using more of expensive material = U
*Yield Variance* = (Actual Total Input - Standard Total Input Allowed for actual output) x Weighted Avg SP of standard mix
OR Yield = Total Quantity Variance - Mix Variance
*Relationship:* Materials Quantity Variance = Mix Variance + Yield Variance
#### 8. Sales Variances – Contribution Approach for CMA
*Sales Price Variance* = (Actual Price - Std Price) x Actual Qty Sold
*Sales Volume Variance (CM)* = (Actual Qty - Budgeted Qty) x Std CM per unit
*For Multi-Product:*
Actual Total Units = AT, Budgeted Total Units = BT
Budgeted Mix % = Budget %
Revised Budget Units = AT x Budget Mix %
*Sales Mix Variance* = Σ (Actual Units - Revised Budget Units) x Std CM
*Sales Quantity Variance* = Σ (Revised Budget Units - Budgeted Units) x Std CM
OR = (AT - BT) x Weighted Avg Budgeted CM
*Check:* Sales Volume Variance = Mix + Quantity
Trap: Favorable Mix can happen even if total units flat – just selling more high-margin products.
#### 9. Disposal of Variances
- Unfavorable = Debit, Favorable = Credit in variance accounts.
- WIP, FG, Raw Material at Standard Cost. Variances recorded separately.
- At year-end:
- If Immaterial: Close all variances to COGS.
- If Material: Prorate among WIP, FG, COGS per GAAP – but for CMA exam, assume close to COGS unless stated material.
#### 10. Quick Revision Formula Sheet for Exam
Variance Formula Sign
Mat Price (AP-SP) x AQ Purch AP>SP=U
Mat Qty (AQ Used - SQ) x SP AQ>SQ=U
Labor Rate (AR-SR) x AH AR>SR=U
Labor Eff (AH-SH) x SR AH>SH=U
VOH Spend Actual VOH - AHxSVOR + = U
VOH Eff (AH-SH) x SVOR + = U
FOH Spend Actual FOH - Budgeted FOH + = U
FOH Vol Budgeted FOH - SHxSFOR Budgeted>Applied = U
Total OH 2-way Budget Actual OH - (Budgeted FOH+SHxSVOR)
Total OH 2-way Volume (Budgeted FOH+SHxSVOR) - Applied
#### 11. Final Strategy for GMSISuccess Students
1. *Always flex:* Calculate SQ and SH for ACTUAL output first.
2. *Price vs Usage:* Price/Rate uses AH/AQ. Efficiency uses SR/SP.
3. *Overhead:* Identify if question asks 2/3/4 way. For 3-way, remember Budgeted for AH vs Budgeted for SH.
4. *Interdependence:* Link variances – Don't judge manager on one variance.
5. *Mix/Yield:* Mix = Proportion, Yield = Total input vs output.
Here are 100 mock test questions on Variance Analysis for the US CMA Part 1 exam, each with a concise, one-line answer.
Direct Materials Variances
1. Q: What is the formula for the direct materials price variance?
A: (Actual Price – Standard Price) × Actual Quantity Purchased.
2. Q: What is the formula for the direct materials usage (quantity) variance?
A: (Actual Quantity Used – Standard Quantity Allowed) × Standard Price.
3. Q: A company bought 35,000 units of material for $105,000. If the standard price is $2.50, what is the actual price per unit?
A: $3.00 per unit ($105,000 ÷ 35,000).
4. Q: If the actual price is $3.00 and the standard price is $2.50 for 25,000 units purchased, what is the materials price variance?
A: $12,500 Unfavorable [( $3.00 – $2.50 ) × 25,000].
5. Q: Standard quantity is 24,000 units. A $2,500 unfavorable quantity variance occurs at a standard price of $2.50. What was the actual quantity used?
A: 25,000 units (24,000 + ( $2,500 ÷ $2.50 )).
6. Q: If actual quantity used is 108,000 lbs and standard quantity allowed is 110,000 lbs at a standard price of $3.60, what is the usage variance?
**A:** $7,200 Favorable [(108,000 – 110,000) × $3.60].
7. Q: An unfavorable materials usage variance is most likely to cause which other variance to be unfavorable?
A: An unfavorable labor efficiency (usage) variance, due to extra handling time.
8. Q: Does the actual sales volume directly impact the materials efficiency variance?
A: No, sales volume does not affect the comparison of standard vs. actual production usage.
9. Q: When is the materials price variance typically isolated?
A: At the time of purchase to provide the earliest possible feedback to the responsible manager.
10. Q: A raw material price variance is also known as what?
A: The purchase price variance.
11. Q: If actual price is $2.02 and standard price is $2.00 for 500,000 lbs purchased, what is the price variance?
A: $10,000 Unfavorable [( $2.02 – $2.00 ) × 500,000].
12. Q: What does a favorable materials price variance indicate?
A: The actual price paid per unit was less than the standard price.
13. Q: What does an unfavorable materials quantity variance indicate?
A: More materials were used in production than the standard allows for the actual output.
14. Q: The standard cost per unit of raw material is calculated using what?
A: Budgeted production quantities and budgeted costs.
15. Q: A materials mix variance arises when a company uses what?
A: A different combination of input materials than the standard mix.
16. Q: The materials yield variance measures the difference between the actual yield and what?
A: The standard yield expected from the actual total inputs used.
17. Q: Who is generally responsible for the materials price variance?
A: The purchasing manager.
18. Q: Who is generally responsible for the materials usage variance?
A: The production manager.
19. Q: If a company produces 22,000 units requiring 5 lbs each, what is the standard quantity allowed?
A: 110,000 lbs (22,000 units × 5 lbs).
20. Q: A favorable usage variance means actual quantity used was ______ than standard quantity allowed.
A: Less.
Direct Labor Variances
21. Q: What is the formula for the direct labor rate variance?
A: (Actual Rate – Standard Rate) × Actual Hours Worked.
22. Q: What is the formula for the direct labor efficiency variance?
A: (Actual Hours – Standard Hours Allowed) × Standard Rate.
23. Q: Actual labor cost is $327,600 for 28,000 hours. What is the actual rate?
**A:** $11.70 per hour ($327,600 ÷ 28,000).
24. Q: If the actual rate is $11.70 and the standard rate is $12.00 for 28,000 hours, what is the rate variance?
A: $8,400 Favorable [( $11.70 – $12.00 ) × 28,000].
25. Q: Standard hours for 22,000 units at 1.25 hrs/unit is what?
A: 27,500 hours (22,000 × 1.25).
26. Q: If actual hours are 28,000 and standard hours are 27,500 at a $12 rate, what is the efficiency variance?
**A:** $6,000 Unfavorable [(28,000 – 27,500) × $12].
27. Q: Standard hours for 5,200 units at 1.25 hrs/unit is what?
A: 6,500 hours (5,200 × 1.25).
28. Q: If actual hours are 6,600 and standard hours are 6,500 at $12/hr, what is the labor efficiency variance?
**A:** $1,200 Unfavorable [(6,600 – 6,500) × $12].
29. Q: A new labor contract signed before the budgeting cycle is a valid explanation for a labor rate variance. True or False?
A: False, the new rates should have been incorporated into the standard.
30. Q: An unfavorable labor efficiency variance means actual hours were ______ than standard hours.
A: Greater.
31. Q: Who is typically responsible for the labor rate variance?
A: The HR or production manager, depending on the cause (e.g., using higher-skilled workers).
32. Q: Who is typically responsible for the labor efficiency variance?
A: The production supervisor.
33. Q: If workers are paid a higher rate than standard, the labor rate variance is ______.
A: Unfavorable.
34. Q: If production is inefficient and takes more hours than standard, the efficiency variance is ______.
A: Unfavorable.
35. Q: The total direct labor variance is the sum of which two variances?
A: The labor rate variance and the labor efficiency variance.
36. Q: A favorable labor rate variance might be caused by using lower-skilled workers, which could lead to what?
A: An unfavorable labor efficiency variance.
37. Q: Standard labor rate is $12/hr. Actual hours are 28,000. Actual cost is $327,600. Is the rate variance favorable or unfavorable?
A: Favorable, because $11.70 actual < $12.00 standard.
38. Q: An efficiency variance is also known as a ______ variance.
A: Usage or quantity variance.
39. Q: If idle time increases, what happens to the labor efficiency variance?
A: It becomes more unfavorable.
40. Q: The labor efficiency variance is calculated using the ______ price/rate.
A: Standard.
Variable Overhead Variances
41. Q: What are the two components of the total variable overhead variance?
A: The variable overhead spending (rate) variance and the variable overhead efficiency variance.
42. Q: What is the formula for the variable overhead spending variance?
A: (Actual Variable OH Rate – Standard Variable OH Rate) × Actual Hours (or Actual OH – (Standard Rate × Actual Hours)).
43. Q: What is the formula for the variable overhead efficiency variance?
A: (Actual Hours – Standard Hours Allowed) × Standard Variable OH Rate.
44. Q: The variable overhead efficiency variance is driven by the efficiency of what?
A: The cost driver (e.g., direct labor hours).
45. Q: If actual variable OH is $294,000, actual DLH is 48,000, and the standard rate is $6.00/DLH, what is the spending variance?
A: $6,000 Favorable [$294,000 – (48,000 × $6.00)].
46. Q: Using the data above (standard DLH allowed = 49,500), what is the variable OH efficiency variance?
A: $9,000 Favorable [(48,000 – 49,500) × $6.00].
47. Q: A favorable variable overhead spending variance means actual spending was ______ than the flexible budget amount.
A: Less.
48. Q: Variable overhead efficiency variance is unfavorable when actual hours are ______ than standard hours.
A: Greater.
49. Q: If variable overhead is applied based on machine hours, the efficiency variance measures the efficiency of what?
A: Machine hours usage.
50. Q: Who is generally responsible for the variable overhead spending variance?
A: The production manager or cost center manager.
51. Q: The variable overhead efficiency variance is essentially a measure of what?
A: The efficient use of the overhead allocation base (e.g., labor hours).
52. Q: If the standard variable OH rate is $6 and actual hours are 48,000, what is the standard variable OH applied for the actual hours?
**A:** $288,000 (48,000 × $6).
53. Q: A favorable efficiency variance for variable overhead means the company used ______ of the allocation base than standard.
A: Less.
54. Q: The total variable overhead variance is the difference between actual variable overhead and what?
A: Standard variable overhead applied to actual production.
55. Q: Variable overhead spending variance is also called the ______ variance.
A: Rate variance.
56. Q: If actual variable overhead is less than the flexible budget for actual hours, the spending variance is ______.
A: Favorable.
57. Q: The variable overhead efficiency variance is calculated using the ______ overhead rate.
A: Standard.
58. Q: An unfavorable labor efficiency variance will often cause what type of variable overhead efficiency variance?
A: An unfavorable one, if labor hours are the allocation base.
59. Q: Variable overhead variances are most meaningful when analyzed ______.
A: On a flexible budget basis.
60. Q: The variable overhead spending variance can be caused by price changes in what?
A: Overhead items like indirect materials or utilities.
Fixed Overhead Variances
61. Q: What are the two components of the total fixed overhead variance under absorption costing?
A: The fixed overhead spending (budget) variance and the fixed overhead volume variance.
62. Q: What is the formula for the fixed overhead spending variance?
A: Actual Fixed Overhead – Budgeted Fixed Overhead.
63. Q: What is the formula for the fixed overhead volume variance?
A: (Denominator Hours – Standard Hours Allowed) × Standard Fixed OH Rate, or Budgeted Fixed OH – Applied Fixed OH.
64. Q: The fixed overhead volume variance measures the utilization of what?
A: Production capacity (denominator level).
65. Q: If a company produces less than the denominator level, the volume variance is ______.
A: Unfavorable.
66. Q: If actual fixed overhead equals the budget, the spending variance is ______.
A: Zero.
67. Q: The fixed overhead volume variance is not a measure of ______.
A: Cost control (spending).
68. Q: A favorable volume variance means actual production exceeded what?
A: The denominator level of activity.
69. Q: Fixed overhead spending variance is also known as the ______ variance.
A: Budget variance.
70. Q: Who is responsible for the fixed overhead spending variance?
A: Management (e.g., department heads) responsible for the fixed cost items.
71. Q: Who is responsible for the fixed overhead volume variance?
A: Production management, as it relates to capacity utilization.
72. Q: The fixed overhead volume variance arises because of a difference between the denominator level and what?
A: Standard hours allowed for actual output.
73. Q: If denominator hours are 10,000 and standard hours allowed are 9,000 at a standard rate of $5, what is the volume variance?
**A:** $5,000 Unfavorable [(10,000 – 9,000) × $5].
74. Q: A fixed overhead volume variance is only calculated under which costing method?
A: Absorption costing.
75. Q: Under variable costing, is a fixed overhead volume variance calculated?
A: No.
76. Q: If budgeted fixed overhead is $100,000 and applied fixed overhead is $90,000, what is the volume variance?
A: $10,000 Unfavorable.
77. Q: The fixed overhead spending variance is the difference between actual fixed overhead and what?
A: The static budget fixed overhead.
78. Q: A volume variance is favorable when standard hours allowed ______ denominator hours.
A: Exceed.
79. Q: The sum of the fixed overhead spending and volume variances equals the total fixed overhead variance. True or False?
A: True (under absorption costing).
80. Q: The fixed overhead volume variance is a measure of ______.
A: Capacity utilization.
Sales Variances
81. Q: What is the formula for the total sales variance?
A: (Actual Selling Price – Standard Selling Price) × Actual Units Sold.
82. Q: The sales price variance isolates the effect of changes in what?
A: Selling price.
83. Q: The sales volume variance measures the effect of selling a different number of units than budgeted. True or False?
A: True.
84. Q: A favorable sales price variance means the actual selling price was ______ than the standard.
A: Higher.
85. Q: A $250,000 favorable flexible-budget revenue variance can be wholly explained by changes in what?
A: Unit selling prices.
86. Q: The sales volume variance can be broken down into what two sub-variances?
A: The sales mix variance and the sales quantity variance.
87. Q: The sales mix variance arises because the actual sales mix differs from what?
A: The budgeted (standard) sales mix.
88. Q: The sales quantity variance measures the impact of selling a different total volume of units, holding what constant?
A: The budgeted sales mix.
89. Q: If a company sells more units than budgeted, the sales volume variance is generally ______.
A: Favorable (assuming a positive contribution margin).
90. Q: Sales variances are typically calculated on what basis?
A: Contribution margin basis.
91. Q: The sales price variance is calculated using the ______ number of units sold.
A: Actual.
92. Q: A sales mix variance is a subset of what larger variance?
A: The sales volume variance.
93. Q: If a company sells a higher proportion of low-margin products, the sales mix variance will likely be ______.
A: Unfavorable.
94. Q: The sales quantity variance is also known as the ______ variance.
A: Sales volume (in units) variance.
95. Q: A flexible budget is adjusted for what?
A: The actual level of activity (sales or production).
96. Q: The difference between actual revenue and flexible budget revenue is due only to what?
A: The difference between actual and budgeted selling prices.
97. Q: The static budget variance is the difference between actual results and what?
A: The static (master) budget.
98. Q: If actual sales volume equals budgeted sales volume, the sales volume variance is ______.
A: Zero.
99. Q: The sales mix variance helps managers understand the impact of changes in what?
A: The relative profitability of products sold.
100. Q: A performance report utilizing flexible budgeting would compare actual costs to what?
A: The flexible budget for the actual activity level.
Below are four CMA Part 1-style illustrations of variance analysis, with calculations, interpretation, and how the variances interconnect. Assume absorption costing for fixed overhead.
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Illustration 1 — Direct Materials: Price vs. Usage Trade-off
Data
· Standard: 5 kg per unit @ $4.00/kg
· Actual production: 10,000 units
· Actual quantity purchased and used: 52,000 kg
· Actual price: $4.20/kg
· Standard quantity allowed = 10,000 × 5 = 50,000 kg
Calculations
· Materials price variance (MPV) = (AP − SP) × AQ = ($4.20 − $4.00) × 52,000 = $10,400 U
· Materials usage variance (MUV) = (AQ − SQ) × SP = (52,000 − 50,000) × $4.00 = **$8,000 U**
· Total materials variance = $10,400 U + $8,000 U = $18,400 U
Interpretation
The company paid more per kg and also used more kg than standard. Purchasing is mainly responsible for the price variance; production is mainly responsible for the usage variance.
Interconnectivity
Price and usage variances often trade off. For example, buying cheaper, lower-grade material may create a favorable price variance but an unfavorable usage variance due to more waste. Conversely, higher-quality material may be unfavorable on price but favorable on usage. Managers must evaluate the net effect, not each variance in isolation.
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Illustration 2 — Direct Labor and Variable Overhead: Rate vs. Efficiency
Data
· Standard labor: 2 hours per unit @ $15.00/hour
· Standard variable OH rate: $5.00 per direct labor hour
· Actual output: 5,000 units
· Actual direct labor hours: 10,500
· Actual labor rate: $14.50/hour
· Actual variable OH: $54,000
· Standard hours allowed = 5,000 × 2 = 10,000 hours
Labor variances
· Labor rate variance = (AR − SR) × AH = ($14.50 − $15.00) × 10,500 = $5,250 F
· Labor efficiency variance = (AH − SH) × SR = (10,500 − 10,000) × $15 = **$7,500 U**
· Total labor variance = $5,250 F + $7,500 U = $2,250 U
Variable overhead variances
· VOH spending variance = Actual VOH − (Standard rate × Actual hours)
= $54,000 − (10,500 × $5) = $54,000 − $52,500 = $1,500 U
· VOH efficiency variance = (AH − SH) × Standard VOH rate
= (10,500 − 10,000) × $5 = **$2,500 U**
· Total VOH variance = $1,500 U + $2,500 U = $4,000 U
Interpretation
The company paid less per labor hour but used more hours than standard. The lower rate may reflect using less-skilled workers, which can explain the unfavorable labor efficiency variance. Variable overhead is also unfavorable because more labor hours were used and because actual VOH spending exceeded the flexible budget.
Interconnectivity
· Labor rate and labor efficiency often move in opposite directions: cheaper labor may be less productive.
· VOH efficiency variance mirrors labor efficiency when direct labor hours are the allocation base. More labor hours → more variable overhead applied/used.
· VOH spending variance is separate: it reflects price/control of overhead items, not hours used.
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Illustration 3 — Fixed Overhead: Spending vs. Volume
Data
· Budgeted fixed overhead: $120,000
· Denominator activity: 12,000 direct labor hours
· Standard fixed OH rate = $120,000 ÷ 12,000 = $10/hour
· Actual fixed overhead: $123,000
· Standard hours allowed for actual output: 11,000 hours
Calculations
· Fixed OH spending variance = Actual FOH − Budgeted FOH
= $123,000 − $120,000 = $3,000 U
· Fixed OH volume variance = (Denominator hours − Standard hours allowed) × Standard FOH rate
= (12,000 − 11,000) × $10 = **$10,000 U**
· Total fixed OH variance = $3,000 U + $10,000 U = $13,000 U
Interpretation
The company overspent fixed overhead by $3,000 and produced less than the denominator capacity, creating an unfavorable volume variance. The spending variance is about cost control; the volume variance is about capacity utilization, not spending.
Interconnectivity
· Fixed OH spending variance is independent of production volume.
· Fixed OH volume variance moves with production volume: producing above denominator → favorable; below → unfavorable.
· Under variable costing, no fixed OH volume variance is calculated. Under absorption costing, it affects cost of goods sold and inventory.
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Illustration 4 — Sales: Price vs. Volume
Data
· Budgeted sales: 10,000 units @ $50
· Actual sales: 9,500 units @ $52
Calculations
· Sales price variance = (Actual price − Standard price) × Actual units
= ($52 − $50) × 9,500 = $19,000 F
· Sales volume variance = (Actual units − Budgeted units) × Standard price
= (9,500 − 10,000) × $50 = **$25,000 U**
· Total sales variance = $19,000 F + $25,000 U = $6,000 U
Interpretation
The company sold at a higher price but at a lower volume. The price increase may have contributed to the volume decline. Overall revenue is still $6,000 below budget.
Interconnectivity
· Sales price and sales volume often trade off: increasing price can reduce volume.
· The sales volume variance can be further split into sales mix variance and sales quantity variance. Selling more of a low-margin product may create a favorable quantity variance but an unfavorable mix variance.
· Sales variances should be evaluated using contribution margin, not just revenue, to judge profitability.
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Key Interconnectivity Summary
Variance area Main trade-off / connection
Materials price vs. usage Cheap/low-grade materials → favorable price, often unfavorable usage
Labor rate vs. efficiency Lower-skilled labor → favorable rate, often unfavorable efficiency
Labor efficiency vs. VOH efficiency Same driver (e.g., DLH) → often move in same direction
VOH spending vs. efficiency Spending = price/control; efficiency = hours/base usage
Fixed OH spending vs. volume Spending = cost control; volume = capacity utilization
Sales price vs. volume/mix Higher price may reduce volume; mix affects profitability
Exam point: Variances are not independent. A favorable variance in one area can cause an unfavorable variance in another. CMA questions often test whether you can calculate each variance and explain the net effect and responsibility.
