Bill of Materials (BOM) generation in Solidworks - Real Business Scenario

Scenario Mode

👤 Your Role: You are a product engineer at a manufacturing company.

📋 Request: Your manager wants a clear Bill of Materials (BOM) report for a new product assembly to understand all parts and quantities needed.

📊 Data: You have access to the SolidWorks assembly file that contains all components and subassemblies with their quantities and part numbers.

🎯 Deliverable: Create a BOM report listing each part number, description, quantity, and material in a table format.

Sample Data

Part Number	Description	Quantity	Material
1001	Base Plate	1	Steel
1002	Screw M6x20	12	Stainless Steel
1003	Support Bracket	2	Aluminum
1004	Cover Plate	1	Plastic
1005	Washer M6	12	Steel
1006	Nut M6	12	Steel
1007	Spring	4	Steel
1008	Pin	2	Steel

1

Step 1: Open the SolidWorks assembly file for the product.

File > Open > Select assembly file

Expected Result

Assembly file loads showing all components and subassemblies.

2

Step 2: Go to the 'Bill of Materials' feature in the assembly toolbar.

Insert > Tables > Bill of Materials

Expected Result

BOM dialog opens ready to configure.

3

Step 3: Select the top-level assembly to include all components and subassemblies.

Select assembly in BOM dialog > Click OK

Expected Result

BOM table appears in the drawing or assembly document.

4

Step 4: Configure BOM columns to show Part Number, Description, Quantity, and Material.

Right-click BOM > Insert > Column > Select properties: Part Number, Description, Quantity, Material

Expected Result

BOM table displays all required columns with correct data.

5

Step 5: Sort the BOM by Part Number ascending for easy reference.

Click Part Number column header > Sort Ascending

Expected Result

BOM rows are sorted by Part Number from smallest to largest.

6

Step 6: Save the BOM as an Excel or CSV file for sharing with procurement.

Right-click BOM > Save As > Choose Excel or CSV format > Save

Expected Result

BOM file saved with all parts and quantities for the product.

Final Result

-------------------------------------------------
| Part Number | Description     | Qty | Material        |
-------------------------------------------------
| 1001        | Base Plate      | 1   | Steel           |
| 1002        | Screw M6x20     | 12  | Stainless Steel |
| 1003        | Support Bracket | 2   | Aluminum        |
| 1004        | Cover Plate     | 1   | Plastic         |
| 1005        | Washer M6       | 12  | Steel           |
| 1006        | Nut M6          | 12  | Steel           |
| 1007        | Spring          | 4   | Steel           |
| 1008        | Pin             | 2   | Steel           |
-------------------------------------------------

✓The product requires 8 unique parts.

✓Screws, washers, and nuts are needed in quantities of 12 each, indicating multiple fastening points.

✓Materials vary between steel, aluminum, stainless steel, and plastic, important for procurement and cost estimation.

Bonus Challenge

Create a grouped BOM that summarizes quantities of identical parts across subassemblies automatically.

Show Hint

Use the 'Indented' BOM type and enable 'Combine like parts' option in SolidWorks BOM settings.

Practice

1.

What is the primary purpose of a Bill of Materials (BOM) in SolidWorks?

easy

A. To list all parts and quantities needed for a product

B. To create 3D models of parts

C. To simulate product movement

D. To generate technical drawings automatically

Solution

1. Step 1: Understand BOM definition

   A BOM is a list that details all parts and quantities required to build a product.

2. Step 2: Compare options with BOM purpose

   Only To list all parts and quantities needed for a product correctly describes the BOM's role in listing parts and quantities.

3. Final Answer:

   To list all parts and quantities needed for a product -> Option A

4. Quick Check:

   BOM = List of parts and quantities [OK]

Hint: BOM always lists parts and quantities, not models or simulations [OK]

Common Mistakes:

• Confusing BOM with 3D modeling or simulation
• Thinking BOM creates drawings automatically
• Assuming BOM is only for assembly instructions

2.

Which menu path in SolidWorks is used to insert a Bill of Materials table?

Choose the correct sequence.

easy

A. Tools > BOM > Insert Table

B. Insert > Tables > Bill of Materials

C. File > New > Bill of Materials

D. View > Tables > BOM

Solution

1. Step 1: Recall SolidWorks menu for BOM

   The correct menu path to insert a BOM is under Insert > Tables > Bill of Materials.

2. Step 2: Verify other options

   Options A, B, and D do not match the correct menu sequence for BOM insertion.

3. Final Answer:

   Insert > Tables > Bill of Materials -> Option B

4. Quick Check:

   Insert > Tables > BOM = Correct menu path [OK]

Hint: BOM is under Insert > Tables, not File or Tools [OK]

Common Mistakes:

• Looking under File or Tools menus
• Confusing BOM insertion with drawing creation
• Selecting View menu instead of Insert

3.

Given an assembly with 3 parts: Part A (2 units), Part B (4 units), and Part C (1 unit), what will the quantity column show in the BOM?

Choose the correct quantities for each part.

medium

A. Part A: 2, Part B: 4, Part C: 1

B. Part A: 1, Part B: 1, Part C: 1

C. Part A: 3, Part B: 4, Part C: 2

D. Part A: 2, Part B: 2, Part C: 1

Solution

1. Step 1: Identify quantities from assembly

   The assembly specifies Part A has 2 units, Part B has 4 units, and Part C has 1 unit.

2. Step 2: Match quantities to BOM output

   The BOM quantity column reflects the exact counts of each part in the assembly.

3. Final Answer:

   Part A: 2, Part B: 4, Part C: 1 -> Option A

4. Quick Check:

   Quantities match assembly counts [OK]

Hint: BOM quantity matches assembly part counts exactly [OK]

Common Mistakes:

• Assuming all quantities default to 1
• Adding quantities incorrectly
• Mixing up part counts

4.

When generating a BOM, a user notices the quantity column shows all 1s, even though some parts have multiple units. What is the most likely cause?

medium

A. The BOM is set to 'Parts Only' instead of 'Top-level only'

B. The assembly is missing part references

C. The BOM is set to 'Top-level only' instead of 'Parts Only'

D. The drawing sheet is not active

Solution

1. Step 1: Understand BOM quantity settings

   'Top-level only' BOM counts each part once regardless of quantity, showing 1 for all.

2. Step 2: Identify correct setting for quantities

   Setting BOM to 'Parts Only' aggregates quantities correctly, showing actual counts.

3. Final Answer:

   The BOM is set to 'Top-level only' instead of 'Parts Only' -> Option C

4. Quick Check:

   BOM setting affects quantity display [OK]

Hint: Use 'Parts Only' BOM to show correct quantities [OK]

Common Mistakes:

• Confusing 'Top-level only' with 'Parts Only'
• Assuming missing references cause quantity errors
• Not checking BOM property settings

5.

You want to create a BOM that updates automatically when parts are added or removed from your assembly. Which approach should you take?

Choose the best practice for dynamic BOM updates.

hard

A. Manually create a BOM in Excel and update it after changes

B. Create BOM only after finalizing the assembly to avoid updates

C. Export BOM once and reuse the static file for all assemblies

D. Insert a linked BOM table in the assembly drawing that updates with changes

Solution

1. Step 1: Understand dynamic BOM update methods

   Linked BOM tables in SolidWorks drawings update automatically when assembly changes.

2. Step 2: Evaluate options for best practice

   Manual Excel or static exports do not update automatically; waiting until final assembly delays updates.

3. Final Answer:

   Insert a linked BOM table in the assembly drawing that updates with changes -> Option D

4. Quick Check:

   Linked BOM = automatic updates [OK]

Hint: Use linked BOM tables for automatic update in drawings [OK]

Common Mistakes:

• Relying on manual Excel BOMs
• Using static exports that don't update
• Delaying BOM creation until assembly is final