IED Unit 1 • Lesson 1.19

Rocket Bill of Materials

Focus question: How do engineers keep track of every part needed to build an assembly?

Download Presentation Flight Plan Interactive What You Submit Back to Unit 1

Mission Briefing

Today’s Plan

Use this page with the lesson presentation and your engineering notebook.

Learning Targets

Explain the purpose and structure of a Bill of Materials.
Create one row for each unique component and record the correct quantity.
Verify the list against the physical assembly and exploded view.

Success Looks Like

Every exploded-view item has one matching BOM row and the quantities describe one complete rocket.

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Opening Prompt

Why should repeated identical parts appear in one BOM row rather than several separate rows?

Think first, then be ready to share a short response that connects the question to engineering communication.

Reveal: why this matters

A BOM lists each unique item once and uses the quantity field to show how many are required. This makes counting, ordering, and checking more reliable.

Core Skill

What We Are Practicing

Key Idea 1

A Bill of Materials is a structured list of the unique parts in an assembly.

Key Idea 2

Item numbers connect the BOM to the exploded view.

Key Idea 3

Quantities must be verified against the physical assembly rather than guessed.

Lesson Interactive

Verify an Exploded View Against a BOM

Compare the item balloons and physical counts with the sample BOM. Select the two errors that must be corrected.

Exploded-View Evidence

Item 1 — Nose Cone — quantity 1
Item 2 — Fin — quantity 3
Item 3 — Body Tube — quantity 1
Item 4 — Retaining Screw — quantity 2

Which BOM issues are present?

Item 4 is missing from the BOM.Item 2 is listed with quantity 2 instead of 3.“Nose Cone” should be replaced with “Pointy Part.”Unknown material information makes the entire BOM invalid.

Every balloon must have one matching row, and quantities must agree with the physical assembly.

Your Task

Build and Verify the Rocket Bill of Materials

Use the physical rocket and exploded view to create a complete parts list.

Transfer each exploded-view item number into a separate BOM row.
Record the quantity, standardized part name, description, and material when known.
Count repeated components carefully for one complete assembly.
Cross-check every row against both the exploded view and the physical rocket.

Quality check: Every ballooned component must have one BOM entry, and every BOM entry must represent a real component.

What You Will Submit

Verified Rocket Bill of Materials

Submit one verified table and one checking note.

One completed BOM with item number, quantity, part name, description, and known material information.
One verification note identifying how the physical assembly and exploded view were used to confirm the list.

Submission standard: Flag unknown information instead of guessing, and use one row per unique item.

Resources

Lesson Resources

Presentation

Lesson 1.19 PowerPoint

Use the lesson slides for guided practice, interactive checks, and the exit ticket.

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Course Hub

Introduction to Engineering Design

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