1.
You use a histogram to look at the root cause category for all defects that have been found over the past year. You find that machine errors are habitually responsible for the largest number of errors across all batches of Black Boxes. You schedule machine calibration checks at the start of every shift to be sure that the machine is always set properly.
2.
The applications being built by your programming team have lots of bugs. So, you write up coding standards that will guide everyone in building the product with more attention to quality.
3.
You set up code reviews at important milestones in your project to catch defects as early as you can.
4.
The applications being built by your programming team have lots of bugs. So, you write up coding standards that will guide everyone in building the product with more attention to quality.
5.
You set up code reviews at important milestones in your project to catch defects as early as you can.
6.
Some of the Black Boxes being built at the factory are only heating up to 500 degrees when the button is pushed. So you set up an automated button presser to press each one and measure its temperature as it comes off of the assembly line.
7.
You’re managing a project to install 13,000 light switches in a new strip mall. You hire a team of inspectors to help your lead electrician find any defective light switches. They check a sample of 650 light switches, and find that 15% of them are defective. You ask your lead electrician to produce a diagram that shows the root cause of defects.
8.
Some of the Black Boxes being built at the factory are only heating up to 500 degrees when the button is pushed. So you set up an automated button presser to press each one and measure its temperature as it comes off of the assembly line.
9.
The programmers on your team write unit tests before they write the code for the application they’re writing. That helps them to think of ways that the application’s design might go wrong and avoid major pitfalls.
10.
You use a Pareto chart to figure out which root causes are responsible for the most defects in the current batch of Black Boxes. It looks like most of them are coming from a machine calibration problem. So you run them back through the machine after recalibrating it.
