You define the rule for calculating the allowances in the "Definition" field of the "Header" tab of the allowance class. This field is multiline. All Parameter required for the calculation of the allowances should be defined before defining the allowances.
Definition of calculation rule
Except for the basic times (also reserve basic times) as well as the times T and ta, all times can be used for the calculation. Variable names that do not correspond to a time type can also be used. Those can be used as intermediate results and in future calculations. The definition must consist only of figures, arithmetic operators, parameters, and time types.
The parameters defined in the "Parameter" tab as well as all time types serve as variables. The definitions are processed row by row. Result times of a definition line can be used as a variable of a subsequent definition row. If allowance times are used as variables, the user has to make sure that the allowance time has a value at the time of calculation. If no value has been assigned to the allowance time, the value 0 is used for calculation.
The result times do not pass their values on automatically corresponding to the time classification tree. In order to pass allowances on to the time per unit (te), proceed as shown in the example above. The result time TE must receive a value assignment. If it is not the case, the intermediate times are not included in the default time calculation.
The accurate calculation of allowances can be checked in the "Testrechnen" tab.
Allowance class with User-specific times
TiCon possesses 12 user-specific time types. These can be included in the time calculation. User-specific times can be calculated from constants, parameters, intermediate results, and other time types. Moreover, they can also be used in other value assignments.  Example for the use of variables / intermediate times
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Conditions can also be defined in order to calculate the allowances. The syntactic structure of the conditions corresponds to the IF commands of the TiCon formula module. Two examples of how conditions can be used are listed below.
Allowances coefficient depending on the time value
If the time TG is greater than 100 (the time value always has the unit TMU), then an allowance of 10 % is calculated to the basic time, otherwise only 5 %. No parameter must be given for this allowance calculation. This calculation is done only depending on TG. |
Allowances coefficient depending on the ratio of TTU/TG
With this allowance calculation, the allowance coefficient can have the values 20, 25, and 30%. If the ratio of TTU/TG is <= 0.3, the allowance coefficient is 20%. At a ratio of 0.3 up to 0.4, it is 25%. If the ratio is > 0.4, the allowance is 30%. |
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The value-added times can be included in the allowance calculation. If value-added times should be considered for the allowance calculation, the codes of the value-added times have to be specified in the allowance calculation. The codes follow the schema VA_TIME_[INDIKATOR]_[KATEGORIE]_[KRITERIUM] or (e.g. VA_TIME_VAAD_VA_VA for value-adding and VA_TIME_VAAD_VA_VA_SETUP for evaluating the set-up time of the value-adding criterion). As of TiCon 4.06, it is possible to use the internal codes va01–va40 in the allowance definition. The corresponding assignment of the internal codes can be found in the table of Ablaufindikatoren in the "Time for allowance calculation" column. |
Calculating time/unit in the structure with this allowance class
For elements of the "Process element" element type, activating the checkbox has no negative effect on the calculation of the times. In general, the te is always calculated on the basis of the tg. Displayed te of the structure <> te in the Times If the checkbox is not activated, the te of the element used is shown in the structure of an MTM analysis. However, no te are forwarded and used for calculation. As a result, the time displayed in the structure can vary from the time in the time classification. The current te is only visible in the time classification and in the structure of parent elements. The calculation of the allowances always takes place at the respective level on the tg. Displayed te of the structure = te in the Times If the check box is active, this results in the te – which is created by the calculation with the element Allowance – being shown directly in the structure. Exception: If the checkbox is activated on an allowance class that is used on elements of the "Process monitor" element type, the te is only calculated within the element. This means that the te of the element used is neither loaded nor displayed. If the checkbox is not active on an allowance class that is used on elements of the "Process monitor" element type, both the te of the element used is shown and calculations continue with this te. In this case, the allowance entered is irrelevant for the element (with regard to global processes). Local processes, in which the te has been entered, are corrected by the allowance at the class. |