Practical example

A practical example is necessary to illustrate the way the above-mentioned facts work. The figures are derived from an existing archive and are subject to the usual work configuration. All figures used in this example are rounded off: the only purpose is to observe the ratio between them.

The basic facts of this archive are:

$ It uses analogue recording tapes with one hour storage capacity.
$ The size of the storage space - where cabinets and shelves are installed - is 25 cubic metre.
$ The cost of housing the complete archive is f. 70,000 a year.
$ The stored information is 12,500 hours.