Forecasting models can be divided into three groups. They are: a. time series, optimization, and simulation methods b. judgmental, random, and linear methods c. linear, non-linear, and extrapolation methods d. judgmental, extrapolation, and econometric methods

The correct answer is letter D

As a demand request for auxiliary products and services as decision making, providing basic information for planning and controlling areas of an organization, such as, for example, finance and accounting, engineering and research, production, distribution and logistics, human resources, marketing.

If the forecast method is Calculation from the previous year, the demand forecast is identical to the Moving Average, except that the number of periods to be taken into account is different. Where: Average demand is calculated as: write-off of the actual item (previous period) / seasonal factor (previous period)

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.