Ch. 12 Quality Toolkit

Choose Your Adventure — Three Activities, One Powerful Toolkit

20 min
⚖️

Quality Cost Courtroom

The $1 Million Blame Game

Your company just had a massive recall. Reallocate the quality budget to prevent it from happening again.

Cost of QualityPrevention vs. FailureAppraisal
20 min
🐟

Fishbone Frenzy

Build the Diagram, Win the Case

A real problem needs a real root cause analysis. Build a fishbone diagram as a team and find the fix.

Fishbone DiagramRoot Cause4 M's
25 min
🏃

The DMAIC Relay

5-Station Speed Challenge

Race through all 5 phases of DMAIC with a pizza delivery crisis. Speed + accuracy = victory.

DMAICParetoPoka-yokeControl Charts

⚖️ Quality Cost Courtroom

Team Activity — 20 minutes

🚨 The Crisis

FreshBite Foods just recalled 50,000 units of contaminated salad kits. The CEO is furious. Total quality costs this year: $1,000,000. Here's how the budget was spent BEFORE the recall:

Current (broken) budget — the company that caused the recall:

Prevention

Training, process design, quality planning
$50,000
5% of budget

Appraisal

Inspection, testing, audits
$100,000
10% of budget

Internal Failure

Scrap, rework, downtime
$350,000
35% of budget

External Failure

Recalls, lawsuits, lost customers
$500,000
50% of budget

💬 Team Discussion (3 minutes):

What's wrong with this budget? Which categories are too high? Too low? Why did the recall happen?

🐟 Fishbone Frenzy

Team Activity — 20 minutes

🍕 The Problem

QuickSlice Pizza is getting destroyed on Yelp. Customer complaints are through the roof: "My pizza arrived cold, late, and wrong — AGAIN." The owner hired your team as quality consultants. Your job: build a fishbone diagram to find the root causes.

Build your fishbone — list causes under each category (one per line):

Goal: Identify as many unique, specific causes as possible. Be concrete — "bad process" doesn't count!

Manpower (People)

0 causes listed

Methods (Process)

0 causes listed

Machinery (Equipment)

0 causes listed

Materials (Ingredients / Supplies)

0 causes listed

🎯 What do you think is the MOST LIKELY root cause?

Sample Causes (What a Consultant Would Find):

Manpower
  • Untrained drivers don't know routes
  • High kitchen turnover = inconsistency
  • No shift supervisor during peak
  • Drivers take personal detours
Methods
  • No double-check on orders before bagging
  • Phone orders misheard, no read-back
  • No standard prep sequence
  • First-in-first-out not followed
Machinery
  • Ovens inconsistently calibrated
  • Insulated bags worn out
  • GPS not used for routing
  • POS crashes during rush hour
Materials
  • Cheap boxes lose heat fast
  • Dough supplier inconsistent
  • Wrong toppings stocked for specials
  • Sauce portioning varies wildly

💡 The Root Cause Pattern

Notice how many causes trace back to lack of standard procedures + no verification step? That's a METHODS problem at its core. The fix isn't just "hire better people" — it's design a better process with built-in checks (poka-yoke) and standard work. This is the Deming lesson: don't blame workers, fix the system.

🎤 Interview Tip

"Walk me through how you'd diagnose a quality problem." → "I'd start with a fishbone diagram using the 4 M's — Manpower, Methods, Machinery, Materials. I list specific causes under each category, then look for patterns. The root cause is usually in Methods or Manpower, and the fix is usually a process redesign with built-in error-proofing."

🏃 The DMAIC Relay

Team Activity — 25 minutes

🍕 The Scenario (All 5 Stations)

SpeedSlice Delivery has a 30% late delivery rate. Customers are leaving. The CEO says: "Fix this or we're done." Your team will race through all 5 DMAIC stations. 4 minutes per station. Go!

Station 1: DEFINE

Identify the problem, the customer, and what "good" looks like.

Station 2: MEASURE

You collected delivery data for 100 orders last week. Here's what you found:

Check Sheet Results (100 orders):
On time (≤30 min): 70 orders
Late by 1–10 min: 18 orders
Late by 11–20 min: 8 orders
Late by 21+ min: 4 orders

Reasons for late (from 30 late orders):
Wrong address / couldn't find house: 3
Kitchen prep took too long: 12
Driver took wrong route: 6
Order wasn't ready when driver arrived: 9

Station 3: ANALYZE

Based on the Pareto analysis, the top two causes account for 70% of late deliveries: (1) Kitchen prep too long, (2) Order not ready when driver arrives. Both point to the KITCHEN.

Station 4: IMPROVE

Time to fix the kitchen process. You have a $5,000 budget. Choose wisely.

Station 5: CONTROL

Your fixes worked! Late deliveries dropped from 30% to 8%. Now: how do you KEEP it that way?

🎤 Interview Tip

"Tell me about DMAIC." → "DMAIC stands for Define, Measure, Analyze, Improve, Control. It's the structured problem-solving methodology used in Six Sigma. You start by defining the problem and the customer, measure how the process is actually performing, analyze the root cause — usually with a Pareto or fishbone diagram — implement improvements, and then control the gains with monitoring tools like control charts. The key is that it's data-driven, not gut-driven."