Here is a minimal example of using UDESS.

We consider a small mine where to access a stope "C", two sections of a gallery (ta1, ta2) must be built sequentially, and shaft (tb), as shown in Fig.

udess ej1

The table in the figure indicates the maximum rates of construction (fraction per month), the perceived economic net worth (eg tb build cost is $ 30) and the precedence. The latter are also represented as arrows in the diagram above.

If we ask UDESS to maximize the NPV of this small mine, the following Gantt chart is obtained (in the Schedule View of UDESS):

udess ej2

Indeed, there being no resource constraints, UDESS schedule building ta1 and ta2 (tunelA1, tunelA2) sequentially and delayed maximum building tb ("tunelB") to maximize the NPV. Finally extracts the stope C (stope) in period 5.

Moreover, considering the availability of certain shared equipment (EQ1 and EQ2) and total consumption of these as shown in the table below, we obtain the optimal scheduling (NPV) displayed next:

udess ej3

In this case we see how UDESS has distributed the resources so as to maximize the total economic benefit to the execution of this mini project.