The Big Breakfast - Delivering Critical Path Analysis
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I love teaching critical path analysis and I recently did this starter activity that went down a storm. I can honestly say that without it, the students would have found the whole concept far more difficult.
At the start of the lesson, I told my students that on Saturday, I was going to cook my two girls a big breakfast. I basically read out the following:
On Saturday, I want to cook myself and my girls a big breakfast.I want to have some toast, scrambled eggs and some bacon.
It takes me 3 minutes to make the toast
It takes 1 minute to break and whisk the eggs and then I need to put them in the microwave for a further 3 minutes.
The grill takes 2 minutes to heat and bacon takes 4 minutes to cook under the grill.
The breakfast takes me 1 minute to serve and a further 10 minutes to eat.
Once I have eaten my breakfast I need to wash up which takes a further 2 minutes and then put the plates away which takes 2 minutes.
What is the quickest time I can do this in.
The results were amazing. I even had some students drawing mini diagrams to show the whole process. Of course, some students just added the times up.
I then got one of my students to come up and draw the whole process. We even discussed float time!
Once they understood how I could make my breakfast the rest was an absolute doddle.
How long did it take. Well, give or take a few seconds to put the grill on etc, the whole breakfast can be made in 21 minutes. Here’s how:
1 Put the grill on
2 Put the bread in the toaster
3 Whisking the eggs takes 1 minute
4 Put the eggs in the microwave – need to be in for 3 minutes
4 Once the grill is ready I put the bacon in – total time so far is two minutes
5 The toast is ready after 3 minutes and the eggs are ready after a total of 4 minutes
6 The bacon finishes after 6 minutes – 6 minutes so far
7 The breakfast takes 1 minute to serve – 7 minutes so far
10 – It takes 10 minutes to eat – 17 minutes so far
11 – Washing up and putting away takes 4 minutes – 21 minutes
Enjoy!
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