Simulation Models Simulation models allow several possible plans to be tested in abstractform. For example, an organization that wants to know the predicted results of differentstaffing alternatives can use a simulation model to determine which is the most costeffective.Ratios Ratios provide a benchmark based on the historic relationship of one variable toanother. For example, the average HR staffing ratio is generally considered to be 1:100. Asan organization’s workforce increases or decreases, this ratio can provide an estimate of thenumber of staff required to provide services for the general employee population.