Cost Analysis for Crushing and Screening – Part II

Sammanfattning: Sandvik SRP has earlier studied a new way of calculating the cost in crushing and screening the results was a satisfactory, Sandvik SRP is now ready to go further in this study. The purpose of this study is further develop of the earlier adopted generic cost model earlier developed by Heyman and Lindström in order to calculate the cost per metric ton within the world of crushing and screening. By implementing the cost calculation in Microsoft excel it would be more user friendly and applicable when calculating the cost in crushing and screening. The model by Hayman and Lindstöm is based on the macroeconomic generic cost-model, developed and published by Ståhl. Heyman and Lindstöm developed a new model to fit the crushing and screening operations better. This model had some issues according to the payroll cost and the deprecation cost which the author now have solved in this study. By implement the cost model in Microsoft Excel by using VBA (Visual Basic for Application) the calculations and simulations can be easy to use when most of the employees are well familiar with Microsoft Excel. To implement the model and to programming all macros that is used is very time consuming and this is the largest part of this study. The results through this study were very accurate according to the results from previous study but the validation was an issue. To validate this study the comparison has been made with Heyman and Lindström results from the previous study. They had such good results and a more quantitative study was not made according to lack of time. The recommendation from the results according to this study is to validate the model even further and not at least for a construction site before further implementation in for example Plant Designer etc.