Daily Quality Challenges

Real SPC decision scenarios from the factory floor. Pick a challenge, make decisions, and sharpen your quality instincts -- no account needed.

Pick a challenge

Choose a scenario below

Make decisions

Analyze data and choose actions

Get your score

See how you did and learn why

Available Challenges

The Machine is Lying to You

You're the injection mold technician on second shift. The machine has been running all day. Quality says the parts are f...

8 min Foundation

Play Challenge

Every Part is Different

You're a quality inspector at a plastics injection molding plant. Your job today: measure 20 parts coming off the machin...

5 min Foundation

Play Challenge

Reading the Signals

Your shift lead hangs a new process behavior chart on the machine. One point jumps above the upper process limit. The pa...

6 min Foundation

Play Challenge

Something Changed

No point breaks the limit, but the chart still feels different. This is where run rules matter.

7 min Difficulty_Practitioner

Play Challenge

The Cpk Trap

You're a quality engineer at an automotive parts supplier. Your customer just rejected a shipment -- 3 out of 500 bore d...

7 min Difficulty_Practitioner

Play Challenge

The Silent Shift

You're a senior quality engineer at an automotive stamping plant. The plant runs two 12-hour shifts on the same press, m...

10 min Difficulty_Analyst

Play Challenge

The Histogram That Surprised Me

You keep measuring fill weights and the data still feels random. Your coach suggests a different view: let the histogram...

5 min Foundation

Play Challenge

Same Machine, Different Day

You are reviewing 20 measurements from the same machine. As a plain list they look harmless. As a histogram they still l...

6 min Foundation

Play Challenge

Where Do the Lines Come From?

An operator asks who decided where the chart limits belong. This scenario shows how the data sets the limits.

7 min Foundation

Play Challenge

Don't Trust the Specs

All parts are still inside spec, but the process behavior chart is whispering that something has already shifted.

6 min Foundation

Play Challenge

The Night Shift Fix

You arrive for night shift and find a note: "Machine was running high. I adjusted it down 3 units." The chart says the p...

7 min Foundation

Play Challenge

The Rules of Engagement

Four different charts appear. Your only job is to decide one thing each time: act or do not act.

6 min Foundation

Play Challenge

The Pattern Detective

One chart at a time, identify whether there is a signal and what kind of signal it is.

6 min Foundation

Play Challenge

Two Machines, One Job

Both machines are stable, but only one may be capable enough for the tighter job.

6 min Foundation

Play Challenge

The Number Everyone Asks For

Your supervisor asks for Cpk, but the chart shows a shift inside the data. What do you report?

6 min Foundation

Play Challenge

Back to Learning Hub