[TIS] can be compared in some ways to Microsoft® Excel in terms of its main computational approach. It should also be possible here to simply define flexible arithmetic logic units using prepared functions. The main difference comprises switching over from individual cellsto working with data sets. Data sets are “arbitrarily” large batches of uniformly sized data records. Operators, graphics etc. are provided depending on the content of the data sets.

  • The user can simply import data into data sets and crossreference to raw data sets and calculation results (which themselves again are data sets) and apply calculations. The special time related know-how is expressed in flexible import and computational operators.
  • In comparison to Microsoft® Excel, using the calculations is considerably easier, as they always act on a whole data set. Calculations can therefore be applied transparently.
  • Graphics and reports are automatically available for presenting time related data.
  • Efficient storing/retrieval of the sets and situational updates of the calculations (automatic updating – if e.g. new data has been added) are supported. These must be automatically updated when new data is imported.
  • These sets are embedded in a system, which help support their management.

Demand for Doctors: The demand varies somewhat from day to day. Until about 22:00 it is higher than later. At night there is on average only one person on duty.

How many doctors are needed simultaneously? The diagram shows the likelihood that at least two doctors need to be on duty simultaneously. At night this is the case around 25% of the time. So being on-call in this case is not enough. It only takes a mouse click to check the data and find out whether 3 or 4 doctors are necessary.

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