It can be saved in databases in computer systems.
Or just written on a plain piece of paper.

Some of the obvious ones

• ERP data
  • Sales figures
  • Purchasing
• Production and Test data
  • Produced in a period
  • Defects

The less (sometimes) obvious( hidden gems)

• Digital drawings
• project hours
• planning data
• How much time is spent on trivial tasks
• How much coffee is consumed pr day
• How many times do an employee do something

Often some information is wanted/needed..
.. but the data is not yet recorded.
Then the soulition is to start record the information.

Some of the gaps that most often occurs are:

• From ERP systems
• From test systems
• Between systems
• Between departments
• Or between something else where a visualization
  of information would be a good idea