╚► S5. Product Variability, Quality and Quality Control Sensory Evaluation

Quality, Quality Control and Sensory Evaluation

Product variability has technical and business implications at the R&D, QA and QC levels —A. Muñoz


IRIS: International Resources for Insights and Solutions, LLC (IRIS)  

provides the following services in this area:



First it is important to determine the area to address:

  • ► Product Quality
  • ► Quality Assurance (QA), or
  • ► Quality Control (QC)


Product Quality

    • Assess the product quality issues to determine if they are related to formulation or other product issues (vs. QC concerns)
    • Determine the factors that might affect the product quality and address, often, as research projects


Quality Assurance (QA) sensory assessments

    • Assess and recommend improvements for established Quality Assurance programs or evaluations
    • Design and implement the optimal Quality Assurance programs or evaluations, if not present


Quality Control (QC) sensory assessments/programs

In general, the main objectives in establishing a QC/Sensory program are:

  • MEASURE product variability across production runs, suppliers, batches, plants, seasons, distribution channels or countries
  • USE variability information AND MAKE RELEVANT PRODUCT DECISIONS at the R&D, Quality Control (QC) or Quality Assurance (QA) levels
  • INVESTIGATE consumer based drivers of quality and consumer tolerance to product variability (to set sensory specifications)
  • CONTROL product/production variability
  • ESTABLISH the best Quality Control (QC) or Quality Assurance (QA Sensory program to meet the company’s needs

The following steps are usually followed when establishing a Quality Control/ Sensory evaluation program:

  • Assessment of needs
  • Assess manufacturing issues and partner with QC, QA and manufacturing professionals
  • Determining product variability through variability studies
  • Setting Quality Control/Sensory Specifications (management or consumer based)
  • Assessment and selection of the best Quality Control Sensory Method to implement
  • Implementing Program
    • Select, orient/train the Quality Control or Quality Assurance/sensory (QC/QA Sensory) panel
    • Maintain the panel and use of data
  • Efective use of QC/Sensory data: analysis, interpretation and applications


IRIS is the leading consulting company in QC/QA Sensory Science.
Acquaint yourself with IRIS’ methods and philosophies in these well known publications