Discuss APICS CSCP Exam Topic 2 Question 130

The use of a seasonal index as a forecasting technique measures the ratio of the:

Aaverage seasonal demand to the average demand for all periods.

Baverage demand for all periods to the average seasonal demand.

Caverage seasonal demand to the standard deviation of the demand for all periods.

Dstandard deviation of the seasonal demand to the standard deviation of demand for all periods.

Suggested Answer: A

A seasonal index is used in forecasting to adjust for regular fluctuations in demand due to seasonal variations. Here's how it works:

Average Seasonal Demand: Calculate the average demand for each season (e.g., monthly or quarterly averages).

Average Demand for All Periods: Compute the overall average demand across all periods in the data set.

Ratio Calculation: The seasonal index is the ratio of the average seasonal demand to the average demand for all periods. This ratio indicates how a particular season compares to the average demand, highlighting periods of higher or lower demand relative to the norm.

Adjustment Factor: This index is then used to adjust forecasts to account for predictable seasonal effects, improving forecast accuracy.

By using the ratio of average seasonal demand to average overall demand, the seasonal index provides a clear measure of seasonal variation.

Chase, C. W. (2013). Demand-Driven Forecasting: A Structured Approach to Forecasting. John Wiley & Sons.

Hanke, J. E., & Wichern, D. W. (2014). Business Forecasting. Pearson.

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12 comments · newest first

Wilda 27 days ago

A is correct! Seasonal indices help us understand demand patterns better.

Jolene 1 month ago

I feel confused. Is it really just about averages?

Alethea 1 month ago

I think it's A. It makes sense to compare seasonal demand to overall demand.

Starr 1 month ago

I don't think it's D, that sounds off.

Francisca 2 months ago

Totally agree with A! Simple and effective.

Theola 2 months ago

Wait, is it really A? I always thought it was more complicated.

Kanisha 2 months ago

I thought it was B, but A makes more sense.

Vilma 2 months ago

It's definitely A! Average seasonal demand to overall average.

Sarah 2 months ago

I thought it was about standard deviations, but that might be for a different concept. I’m confused between A and D.

Shelba 2 months ago

I practiced a similar question, and I feel like the seasonal index definitely involves averages, but I can't recall the exact ratio.

Katie 3 months ago

I’m not entirely sure, but I remember something about averages in forecasting. Could it be B?

Audria 3 months ago

I think the seasonal index is about comparing average seasonal demand to overall average demand, so I’m leaning towards A.

APICS CSCP Exam - Topic 2 Question 130 Discussion