Costing tool for estimation in Solidworks - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ dax_lod_result

intermediate

Calculate Total Estimated Cost Using DAX

You have a table named Parts with columns PartID, MaterialCost, and LaborCost. You want to create a DAX measure that calculates the total estimated cost by summing material and labor costs for all parts.

Which DAX expression correctly calculates this total estimated cost?

A Total Estimated Cost = SUM(Parts[MaterialCost] + Parts[LaborCost])

B Total Estimated Cost = SUM(Parts[MaterialCost]) + SUM(Parts[LaborCost])

C Total Estimated Cost = SUMX(Parts, Parts[MaterialCost] + Parts[LaborCost])

D Total Estimated Cost = SUMX(Parts, Parts[MaterialCost]) + Parts[LaborCost]

💡 Hint

Think about how to sum two columns row by row before adding all rows.

Option C uses SUMX to add material and labor costs for each row, then sums all rows. Option C sums columns separately then adds totals, which works but can be less efficient. Option C is invalid because SUM cannot sum an expression. Option C has syntax error because Parts[LaborCost] is outside SUMX.

❓ visualization

intermediate

Best Visualization for Cost Breakdown by Material Type

You want to show the cost breakdown by material type in a dashboard. Which visualization type is best to clearly show the proportion of total cost each material contributes?

A Scatter plot showing cost vs. quantity for each material

B Stacked bar chart showing cost by material type over time

C Line chart showing cost trends for each material type

D Pie chart showing percentage of total cost by material type

💡 Hint

Think about which chart best shows parts of a whole.

A pie chart (Option D) clearly shows how each material's cost contributes to the total cost as parts of a whole. Stacked bar charts and line charts are better for trends over time. Scatter plots show relationships between two variables, not proportions.

❓ data_modeling

advanced

Designing a Data Model for Cost Estimation

You need to design a data model for a costing tool that estimates manufacturing costs. The data includes parts, materials, labor rates, and machine times. Which modeling approach best supports flexible cost calculations and easy updates?

A Single flat table with all cost details combined for each part

B Separate tables for Parts, Materials, Labor Rates, and Machine Times linked by keys

C One table for Parts and Materials combined, another for Labor and Machine Times combined

D Multiple disconnected tables for each cost component without relationships

💡 Hint

Think about normalization and relationships for maintainability.

Option B is best because separate related tables linked by keys allow flexible updates and accurate calculations. Option B is hard to maintain and update. Option B mixes unrelated data reducing clarity. Option B lacks relationships, making calculations difficult.

🎯 Scenario

advanced

Handling Missing Data in Cost Estimation

In your costing tool, some parts have missing labor cost data. You want to estimate total cost without errors and avoid underestimating. Which approach is best?

A Use average labor cost from similar parts to fill missing values before calculation

B Exclude parts with missing labor cost from total cost calculation

C Treat missing labor cost as zero in calculations

D Ignore missing labor cost and calculate total cost using only available data

💡 Hint

Think about how to avoid bias and keep estimates realistic.

Option A is best because imputing missing labor costs with averages from similar parts avoids underestimating and keeps data consistent. Option A excludes data reducing completeness. Option A treats missing as zero, underestimating cost. Option A ignores missing data, causing inaccurate totals.

🔧 Formula Fix

expert

Debugging a DAX Measure for Cost Estimation

You wrote this DAX measure to calculate average cost per part:

Average Cost = AVERAGE(Parts[MaterialCost] + Parts[LaborCost])

When you use it, you get an error. What is the cause?

Solidworks

Average Cost = AVERAGE(Parts[MaterialCost] + Parts[LaborCost])

A You cannot add two columns inside AVERAGE; it expects a single column reference

B The measure is missing a SUMX function to iterate over rows

C The syntax is correct; the error is due to missing data in LaborCost

D AVERAGE cannot be used on numeric columns

💡 Hint

Check what arguments AVERAGE accepts.

AVERAGE expects a single column reference, not an expression adding two columns. You must use SUMX to add columns row by row before averaging. Option A is close but the error is specifically about AVERAGE's argument. Option A is incorrect because syntax causes error. Option A is false; AVERAGE works on numeric columns.

Practice

1.

What is the main purpose of the SolidWorks costing tool?

easy

A. To create 3D animations of the design

B. To simulate the physical behavior of parts

C. To estimate manufacturing costs from a CAD model

D. To generate marketing materials automatically

Solution

1. Step 1: Understand the costing tool function

   The costing tool analyzes the CAD model to estimate how much it will cost to make the part.

2. Step 2: Compare options

   Other options like animation or simulation are not related to cost estimation.

3. Final Answer:

   To estimate manufacturing costs from a CAD model -> Option C

4. Quick Check:

   Costing tool = cost estimation [OK]

Hint: Costing tool = cost estimation from model [OK]

Common Mistakes:

• Confusing costing with simulation
• Thinking it creates animations
• Assuming it generates marketing content

2.

Which of the following is the correct way to start a costing analysis in SolidWorks?

CostingTool.StartAnalysis()

easy

A. CostingTool.RunEstimate()

B. CostingTool.BeginCosting()

C. CostingTool.InitCost()

D. CostingTool.StartAnalysis()

Solution

1. Step 1: Identify the correct method name

   The method StartAnalysis() is the correct syntax to begin costing analysis in SolidWorks API.

2. Step 2: Check other options

   Other method names like BeginCosting(), InitCost(), and RunEstimate() are incorrect or do not exist.

3. Final Answer:

   CostingTool.StartAnalysis() -> Option D

4. Quick Check:

   Correct method = StartAnalysis() [OK]

Hint: Look for method with 'Start' and 'Analysis' words [OK]

Common Mistakes:

• Using incorrect method names
• Confusing initialization with analysis start
• Assuming similar sounding methods exist

3.

Given the following costing parameters:
MaterialCost = 10
LaborCost = 5
MachineCost = 3
What is the total estimated cost calculated by TotalCost = MaterialCost + LaborCost + MachineCost?

medium

A. 18

B. 15

C. 10

D. 8

Solution

1. Step 1: Add material, labor, and machine costs

   MaterialCost (10) + LaborCost (5) + MachineCost (3) = 10 + 5 + 3 = 18

2. Step 2: Confirm total cost calculation

   The formula sums all costs correctly to get total cost.

3. Final Answer:

   18 -> Option A

4. Quick Check:

   Sum costs = 18 [OK]

Hint: Add all cost components for total [OK]

Common Mistakes:

• Adding only two costs
• Mixing up cost values
• Forgetting to sum machine cost

4.

Identify the error in this costing calculation snippet:

MaterialCost = 12
LaborCost = '5'
TotalCost = MaterialCost + LaborCost

medium

A. TotalCost calculation is correct

B. LaborCost is a string, causing a type error

C. MaterialCost should be a string

D. Missing semicolon after LaborCost

Solution

1. Step 1: Check variable types

   MaterialCost is a number (12), but LaborCost is a string ('5'), which cannot be added directly.

2. Step 2: Identify error in addition

   Adding number and string causes a type error in most languages.

3. Final Answer:

   LaborCost is a string, causing a type error -> Option B

4. Quick Check:

   Type mismatch = error [OK]

Hint: Ensure all costs are numbers before adding [OK]

Common Mistakes:

• Ignoring data types
• Assuming implicit conversion
• Thinking semicolon is required

5.

You want to estimate the cost of a part with variable material thickness. The costing tool allows you to set a parameter Thickness that affects material cost. If material cost per unit thickness is $4, and thickness is 2.5 units, what is the material cost?

hard

A. $10

B. $6.5

C. $8

D. $12

Solution

1. Step 1: Understand cost calculation

   Material cost = cost per unit thickness * thickness = 4 * 2.5

2. Step 2: Calculate total material cost

   4 * 2.5 = 10

3. Final Answer:

   $10 -> Option A

4. Quick Check:

   4 x 2.5 = 10 [OK]

Hint: Multiply unit cost by thickness [OK]

Common Mistakes:

• Adding instead of multiplying
• Using wrong thickness value
• Confusing units and cost