Sensory Evaluation Techniques
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Sensory tests called ‘Sensitivity tests’ or ‘Screening tests’ are asking two main questions: ‘How sensitive are people to sensory characteristics?’ and ‘What is the minimum detectable concentration of a substance?’ These tests aim to screen and to find the best suitable candidates to perform as assessors and sensory experts in specialized sensory tests during products’ evaluation as well as are used to screen regular employees directly responsible for product development and production.
Difference tests are among the simplest sensory tests. They are based on comparison of samples and answer the key question: ‘Is there a perceivable difference between products?’ Depending on the objective, they can be used to assess either similarity or difference between samples.
Difference tests are applied when the goal is, for example, to compare a product with a competitor’s offering or to evaluate improvements in a formulation. Similarity tests are used when the objective is to confirm that a product change—such as ingredient replacement—remains undetectable to consumers and that product consistency is maintained.
Mostly used tests:
- Triangle test
- Duo-Trio test
- Ranking test
Descriptive techniques are more complex sensory tests and are used to describe differences between products. They are based on a comparison of samples and answer two main questions: ‘What are the sensory characteristics of a product?’ and ‘How can differences between products be described?’
These tests are performed by a small group of well-trained sensory experts (sensory panel). Panelists are trained to use standardized scales for each attribute. Each assessor undergoes a training process aimed at aligning perception and interpretation of sensory stimuli, including identification of attributes such as taste, aroma, texture, and appearance, as well as their precise scaling according to the adopted methodology.
Thanks to this approach, it is possible to obtain an objective, repeatable, and multidimensional description of a product’s sensory profile, which provides essential support for product development and quality decision-making.
Applications of descriptive techniques:
- Product development and modification – development of new formulations and improvement of existing products
- Product comparison – analysis of differences between own products and competitors’ offerings
- Quality control – monitoring product compliance with sensory standards quality control
- Data integration – correlation of sensory results with instrumental data
- Product profiling – building a complete sensory profile of a product
- Change monitoring – evaluation of product stability over storage time
Quantitative Descriptive Analysis (QDA®) is one of the main descriptive analysis techniques used in sensory evaluation. This technique is a behavioural sensory evaluation approach that uses descriptive expert panels to measure a product’s sensory characteristics.
Panel members use their senses to identify perceived similarities and differences between products and describe those perceptions in their own words.
Sensory evaluation is a science that measures, analyzes, and interprets the reactions of the senses of sight, smell, sound, taste, and texture of products.
The company Consumer Insight Consulting provides specialized consulting services tailored to clients’ individual needs in the field of sensory methods.
Support includes both the design of sensory systems and the development of competencies of teams responsible for quality, product development, and consumer research.
The scope of activities covers a comprehensive approach to building and optimizing sensory processes in organizations—from the conceptual stage through implementation to the operational functioning of sensory laboratories.
Scope of services:
● Selection and recruitment of sensory panelists
Selection of candidates with appropriate sensory predispositions and building professional evaluation panels.
● Training of panelists and laboratory staff
Training programs developing competencies in sensory methods and standardization of evaluations.
● Know-how transfer and sensory laboratory setup
Design and organization of professional laboratories along with implementation of research procedures.
● Selection of sensory equipment
Support in choosing equipment and research tools tailored to standards and business objectives.
SENSORY TRAININGS & WORKSHOPS FOR COMPANIES
The company Consumer Insight Consulting delivers sensory trainings and workshops dedicated to companies, conducted in an on-site format at the client’s location. These programs are primarily designed for employees of marketing departments, R&D, quality assurance, and production teams.
Sensory trainings cover fundamental topics in sensory science as well as practical exercises enabling participants to understand product evaluation mechanisms. Participants gain knowledge necessary to interpret research results and apply them in a business context.
As part of sensory workshops, participants are introduced to the basics of sensory science and take part in practical sensory tests. Each session concludes with an individual assessment of participants, allowing them to better understand their own sensory predispositions.
There is also the possibility of full customization of the workshop program, tailored to the specific needs of the organization, product profile, and the client’s business objectives.
The company Consumer Insight Consulting provides specialized consulting services in the design and execution of professional sensory tastings within client organizations. Support covers laboratory environments, office settings, and production facilities, particularly for companies in the food and cosmetics industries.
The aim of these activities is to ensure that product evaluation is conducted under conditions that are as objective, neutral, and compliant with good sensory research practices as possible, which translates into high reliability of the obtained results.
Upon client request, the participation of an independent expert in sensory tastings is possible, acting in an advisory or supervisory role during the study, which further strengthens the reliability of the evaluation process.
The company Consumer Insight Consulting offers a comprehensive package of solutions supporting product quality control during the production process. The goal of the implemented activities is to minimize the risk of the so-called “product blurring effect,” resulting from insufficient or inconsistent sensory control of the final product in long-term production.
The application of this approach enables the maintenance of high sensory consistency and ensures product repeatability over time, regardless of production scale or the length of the manufacturing cycle.
The company Consumer Insight Consulting provides specialized consulting services in the design, construction, and organization of professional sensory panels and laboratories.
Within the scope of its services, the company delivers expert knowledge covering recruitment and selection processes for panelists, including the assessment of individual sensory abilities of candidates required for high-precision sensory research.
An important part of the offer also includes specialized training programs aimed at competence development, designed to prepare and certify sensory experts and to build professional evaluation panels.
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