Finding the first solution

The first method costs the stream by the investment needed for the installation of measurement, the second by operating costs of the measurement, and the third by the total cost of one year of measurement (at eight percent depreciation rate). 

The maximum spaiming tree found by the j-th method of graph costing minimizes the objective function defined by 

The information can be completed by mentioning the precision of the measurement system as a whole, expressed as the mean relative sUuidard deviation 6m, defined as 

An example of using the method for single-component balancing is given in Madron (1992), Subsection 6.3.3. For a system containing 16 units and 49 streams, the calculation performed on a WANG 2200 computer took 30 seconds. 

The optimal selection of measuring points in the case of a single-component balance by the method of finding the maximum spanning tree is applicable even when we are not able to assign costs to streams exactly. Sometimes it is possible to arrange the streams in accordance with our wish to measure them directly. The order in such a series (number one is ascribed to the stream that can be measured in the easiest way) is so-called priority of 

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