Chapter 5 & 6 QMB

Lakukan tugas rumah & ujian kamu dengan baik sekarang menggunakan Quizwiz!

If the multiplicative decomposition model is used to forecast daily sales for a retail store, how many seasons will there be?

7

Qualitative forecasting models include

Delphi

If the seasonal index for January is 0.80, then

January sales tend to be 20% lower than an average month.

Which of the following methods produces a particularly stiff penalty in periods with large forecast errors?

MSE

An exponential smoothing forecast with a smoothing constant of 1 would result in the same forecast as

a naïve forecast

Which of the following is not a part of every linear programming problem formulation?

a redundant constraint

Which of the following is used to alert the user of a forecasting model that a significant error occurred in one of the periods?

a tracking signal

The computer monitoring of tracking signals and self-adjustment is referred to as

adaptive smoothing

Which of the following is not a property of linear programs?

at least two separate feasible regions

Which of the following may be negative?

bias

Which of the following methods tells whether the forecast tends to be too high or too low?

bias

A constraint with zero slack or surplus is called a

binding constraint

Which of the following is not a component of a time series?

causal variations

In exponential smoothing, if you wish to give a significant weight to the most recent observations, then the smoothing constant should be

close to 1

The mathematical theory behind linear programming states that an optimal solution to any problem will lie at a(n) ________ of the feasible region.

corner point or extreme point

The process of isolating linear trend and seasonal factors to develop more accurate forecasts is called

decomposition

Which of the following is a time-series model?

exponential smoothing

Which of the following is not classified as a qualitative forecasting model?

exponential smoothing

As one increases the number of periods used in the calculation of a moving average

less emphasis is placed on more recent data.

A widely used mathematical programming technique designed to help managers and decision making relative to resource allocation is called

linear programming

Which of the following is a technique used to determine forecasting accuracy?

mean absolute percent error

A feasible solution to a linear programming problem

must satisfy all of the problem's constraints simultaneously

In picking the smoothing constant for an exponential smoothing model, we should look for a value that

produces values which compare well with actual values based on a standard measure of error

One example of a causal model is

regression analysis

Sales for a company are typically higher in the summer months than in the winter months. This variation would be called a

seasonal factor

If both trend and seasonal components are present in a time series, then the seasonal indices

should be computed based on CMAs

Which of the following is not an assumption of LP?

simultaneity

The difference between the left-hand side and right-hand side of a less-than-or-equal-to constraint is referred to as

slack

A trend equation is a regression equation in which

the independent variable is time

If one changes the contribution rates in the objective function of an LP,

the slope of the isoprofit or isocost line will change.

Infeasibility in a linear programming problem occurs when

there is no solution that satisfies all the constraints given

A forecasting model that uses only historical data for the variable being forecast is called a

time-series model

Which of the following is not considered to be one of the components of a time series?

variance

When comparing several forecasting models to determine which one best fits a particular set of data, the model that should be selected is the one

with the lowest MAD

When is the exponential smoothing model equivalent to the naïve forecasting model?

α = 1


Set pelajaran terkait

Unit 28 - Single-Phase Transformers

View Set

The Universe Next Door 8-9 quiz review by Huy

View Set

CH. 14 Developmental Nursing Care

View Set

Body Paragraphs, Introduction, and Conclusion

View Set

Choice in a World of Scarcity - Chapter 2

View Set

Cisco CCNA CyberOps Associate (Version 1.0) All Modules & Final Exam

View Set