You can compare forecasting methods by one of these methods:
1- MAD(mean absolute deviation)
2-MSE (mean square error)
3-MAPE(mean absolute percentage error)
Notes:
1-MAD is the preferred method since it does not require squaring the errors and this is the only difference between MAD and MSE .
2-If you want to relate the error relative to the actual demand use MAPE
that is because in MAPE you will divide the error by the actual demand.
Quantitive Skills
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For steel tube joining various methods are involved welding , adding a small bit of pipe slightly larger than two pies all having threads insert both pipes into the small bit pipe applying shellac varnish or araldite makes bonding. Another method is brazing and silver brazing
A nice example of mass-customization: http://www.sunclipies.com They offer exactly tailored sunglass clip-ons for correctional eyeglasses, based on a foto, which the owner of the eyeglasses sends. Like this the sunglass clip ons are really exactly tailored.A contrasting method would be to just mass-produce shapes which match the eyeglasses shapes somehow.
*Which* two methods?
The two general approaches to forecasting are quantitative methods, which rely on historical data and mathematical models to predict future outcomes, and qualitative methods, which use expert judgment, market research, and other non-numeric factors to make forecasts.
Three methods commonly used to determine the accuracy of a forecasting method are Mean Absolute Error (MAE), Mean Squared Error (MSE), and Root Mean Squared Error (RMSE). These metrics compare the forecasted values to the actual observed values, providing a numerical measure of the forecasting method's accuracy.
The two organizational methods are by Subject and by Points.
Spyros G. Makridakis has written: 'Interactive forecasting' -- subject(s): Forecasting, Data processing 'Forecasting : methods and applications' -- subject(s): Forecasting
Qualitative methods of forecasting include expert judgment, Delphi technique, market research, historical analogy, and scenario analysis. These methods rely on subjective inputs and qualitative data to predict future trends or outcomes.
The answer will depend on what you wish to compare. There are different methods to compare the means, variances as well as other characteristics of the two sets.
climatology method
Methods to predict future data based on historical records
There are many methods of sales forecasting. One method is to look at what has happened in the past and based on that, predict the future.
The demand for forecasting methods for new products vary from those for established product because the new products have not yet proven to have steady sales.
Curvilinear forecasting allows for a more flexible modeling approach that can capture nonlinear relationships between variables, which may be present in real-world data. This can result in more accurate predictions compared to linear forecasting methods.