1. Data Preparation

Question 1

What can you use a dotted chart for?

Answer 1

Data can be explored and hypotheses can be formed

Question 2

What does one dot represent in a dotted chart?

Answer 2

One event (so dotted chart represents overall view of all events)

Question 3

What should we look for in dotted charts?

Answer 3

• Changing arrival rates (changing gradients of traces vs. actual time)
• Batched events (line of same colour in gradients of traces vs. actual time where colour is event type)
• Time-outs (vertical lines in relative time dotted charts)

Question 4

What can gaps in a dotted chart represent?

Answer 4

Resources aren’t available (a single point of failure scenario)

To check this: see if a particular resource has a gap here (and the others don’t). Check if anyone else does this resource’s particular tasks

If multiple people do task and they ‘seem’ to be available then maybe system issue etc. which blocks the rest of the process from proceeding

Question 5

What should you do with hypotheses?

Answer 5

Validate them with the process owner!

Question 6

How are days sorted in a dotted chart?

Answer 6

Sunday to Saturday

Question 7

How are cases sorted in a dotted chart?

Answer 7

If we us trace name as the y-axis then they are ordered in the same way as the log file (which is usually based on time)

Question 8

If you have gaps that might be weekends in your dotted chart can you conclude that this is probably a weekend gap?

Answer 8

Apparently according to the exercise (but let’s write this assumption)