XLSTAT-MX functions

Preference Mapping (PREFMAP) Build decision making maps to:

• Improve or develop products • Position products in comparison with competitors’ products• Reach a target market

Preference mapping = a powerful tool to optimize product acceptability.

XLSTAT-MX offers several regression models to project complementary data on the objects maps:

• Vector model,• Circular ideal point model,• Elliptical ideal point model,• Quadratic ideal point model.

Preference Mapping (PREFMAP) 10 commercial samples of potato chips 99 consumers satisfaction from 1 to

30 Consumers are segmented into 9

clusters

Preference Mapping (PREFMAP)

GPA is pretreatment used to reduce the scale effects and to obtain a consensual configuration.

Generalized Procrustes Analysis (GPA)

Generalized Procrustes Analysis (GPA) GPA compares the proximity between

the terms that are used by different experts to describe products.

Multiple Factor Analysis (MFA) MFA is a generalization of PCA

(Principal Component Analysis) and MCA (Multiple Correspondence Analysis).

MFA makes it possible to:• Analyze several tables of variables

simultaneously, • Obtain results that allow studying the

relationship between the observations, the variables and tables.

36 experts have graded 21 wines analysed on several criteria:• Olfactory (5 variables)• Visual (3 variables)• Taste (9 variables)• Quality (2 variables)

Multiple Factor Analysis (MFA)

Multiple Factor Analysis (MFA) MFA groups the information on one chart

Multiple Factor Analysis (MFA) MFA groups the information on one chart

Multiple Factor Analysis (MFA)

Wine 13 is in the direction of the two quality variables and is therefore the wine of preference.

Multiple Factor Analysis (MFA)

The olfactory criteria are often increasing the distance between the wines.

Penalty analysis Identify potential directions for the

improvement of products, on the basis of surveys performed on consumers or experts.

Two types of data are used:• Preference data (or liking scores) for a product or for a characteristic of a product

• Data collected on a JAR (Just About Right) scale

Penalty analysisA type of potato chips is evaluated:

By 150 consumersOn a JAR scale (1 to 5) for 4 attributes:

• Saltiness, • Sweetness, • Acidity, • Crunchiness.

And on an overall liking (1 to 10) score scale

Penalty analysis

Mean of Liking for JAR – Mean of Liking for too little and too much

Semantic differential charts The semantic differential method is a

visualization method to plot the differences between individuals' connotations for a given word.

This method can be used for:• Analyzing experts’ agreement on the

perceptions of a product described by a series of criteria on similar scales

• Analyzing customer satisfaction surveys and segmentation

• Profiling products

Semantic differential charts 1 yoghurt

5 experts

6 attributes:• Color• Fruitiness• Sweetness• Unctuousness• Taste • Smell

Semantic differential charts

TURF analysis TURF = Total Unduplicated Reach and

Frequency method

Highlight a line of products from a complete range of products in order to have the highest market share.

XLSTAT offers three algorithms to find the best combination of products

TURF analysis 27 possible dishes 185 customers

"Would you buy this product?" (1: No, not at all to 5: Yes, quite sure).

The goal is to obtain a product line of 5 dishes maximizing the reach

TURF analysis

Product characterization Find which descriptors are discriminating

well a set of products and which the most important characteristics of each product are.

All computations are based on the analysis of variance (ANOVA) model.

Check the influence on the scores of attributes of:

• Product• Judge

• Session• Judge*Product

Product characterization

29 assessors

6 chocolate drinks

14 characteristics: • Cocoa and milk taste and flavor• Other flavors: Vanilla, Caramel• Tastes: bitterness, astringency,

acidity, sweetness• Texture: granular, crunchy, sticky,

melting

Product characterization

DOE for sensory data analysis Designing an experiment is a

fundamental step to ensure that the collected data will be statistically usable in the best possible way. 

DOE for sensory data analysis Prepare a sensory evaluation where

judges (experts and/or consumers) evaluate a set of products taking into account:

• Number of judges to involve• Maximum number of products that a judge

can evaluate during each session• Which products will be evaluated by each of

the consumers in each session, and in what order (carry-over)

Complete plans or incomplete block designs, balanced or not.

Search optimal designs with A- or D-efficiency

60 judges 8 products Saturation: 3 products / judge

DOE for sensory data analysis

DOE for sensory data analysis

DOE for sensory data analysis

Let XLSTAT-MX be part of your product development strategy.

info@xlstat.com