AAOM Handbook

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3.4 Modelling the Business Structure Once all the Business Structure inputs specified the Business Structure can be modelled and calculated using a statistical Monte Carlo simulation to perform risk analysis using a stochastic simulation of interdependent processes. The Business Structure depicted in Figure 9 is used to illustrate modelling of the Business Structure:

Figure 9 - High Level Business Structure to illustrate how to model a BSP model • Mine for example is a transform process and has input parameters and distribution defined in the Inputs tab. This defines the Unconstrained Mine Total (t/d) column depicted in Figure 10. In this case this is a combination of waste, very low-grade ore and full grade ore. • Mine is an intermediate process, i.e. there is a process before and after the Mine process. This is important as it determines which flowchart to use to develop the equation to calculate the constrained output.

MINE Unconstr. Output (Total tonnes)

237,461 255,756 182,182 209,499

Figure 10 – Unconstrained Mine calculation

Operational Planning: Building a Business Structure Performance Model Page 15 of 39