In-depth | cost analysis
all components of the selected building the shares of the calculation objects with
group, including subordinated assemblies the different hardness grades are displayed
if necessary. Here it is to be noted that the as a pie chart. With it the evaluation gives
prospective forecast error applies not for an overview, like many components with a
the complete selected assembly (in this higher divergence between the planned and
example propulsion plant), but for every actual values has to be expected. Depending
single component of this group. Depending on the settings made by the user, this
of the number of the components the partitioning either refers to the cost portion of
divergence of the complete assembly will the components or to their portion according
be clearly lower as a result of the statistical to the number of all components. While the
error compensation. statement referring on the cost portion gives
a clue to the resultant forecast inaccuracy, the
Display of the risk distribution and analysis which refers to the number gives an
calculation of the resultant forecast error: overview, of how many objects the estimation
After the hardness grades and with them quality must be improved if the accuracy of Figure 8. implementation of costfact.
the prospective forecast errors have been the complete cost forecast is to be increased.
specified for the different calculation objects,
the resulting uncertainty can be calculated conclusion methods. The systematic procedure, provided
and displayed for the complete project or By using costfact, cost planning in by the described feature of costfact, leads
also a single building group (Figure 7). The shipbuilding becomes quicker, clearer and to quantified evaluations of the prospective
top range of this display form indicates the more reliable when compared to conventional divergences. These evaluations support the
complete prospective forecast error for the procedures. The improvement of cost decision-making with the quotation costing
considered object which arises from the planning contributes to the economic success and show if necessary the need to improve
forecast divergences of the single components of projects and consequently to the success of the quality of available cost forecasts by
and the statistical error compensation. With the shipyard. A special strength of costfact is procuring additional information. Figure
this information about possible worst and the consideration of uncertainties with which 8 shows a benefit-cost-analysis of costfact
best case scenarios of the project can be won cost forecasts are always combined. These and answers some questions around its
in addition to the planned costs. Furthermore, uncertainties can be handled by suitable implementation. NA
26 The Naval Architect February 2010
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