RAPS - This course has been pre-approved by RAPS as eligible for up to 4 credits towards a participant's RAC recertification upon full completion.

Training Overview

Manufacturers of foods, drugs, consumer goods, and other products must determine the shelf life of their products so that customers know when the product can be expected to perform as intended. Many approaches are available to quantify the "shelf life" and the method(s) chosen often depend on the testing time available.  

This webinar discusses the steps to design a stability study and analyze the results to estimate the product's shelf life. The use of regression models to model the relationship between the response variable(s) and time are presented. Models useful for describing non-linear degradation over time are also presented. Additionally, methods for handling non-normal response data are also discussed. The use of accelerating variables to shorten the study time and the models required are presented. Finally approaches for including the affect of other variables on shelf life (such as packaging type, storage conditions) are presented. The webinar includes several examples and case studies to illustrate the methods discussed. Datasets will be provided to the class participants so they can follow along with the instructor, as desired. The datasets will be provided in Minitab and Excel formats (The analyses will be performed in this webinar using Minitab).

Webinar Takeaway

This program will cover the following topics:

Sesssion I – 80 Minutes (including 10 minute break)

  • Planning a Stability Study (Study Objectives, Identifying Resources)
  • Basic Statistics
  • Determining Performance Specifications
  • Defining & Determining Shelf Life
  • Confidence Levels
  • Importance of Adequate Measurement Systems
  • Life Data Analysis Approach for Determining Shelf Life

Session II – 80 Minutes (including 10 minute break)

  • Life Data Analysis Approach for Determining Shelf Life (cont’d)
  • Life Data Analysis with Accelerated Aging
  • Regression Modeling (Linear and Non-Linear) to Assess Stability/Shelf Life

Session III – 80 Minutes (including 20 minutes for Q&A)

  • Pooling Batches for Stability Studies
  • Validating Model Assumptions
  • Methods for Handing Non-Normal Response Data
  • Introduction to Accelerated Stability Testing
  • Accelerated Stress Factors and Models
  • Sample Size Implications and Guidelines
  • Modeling Shelf Life as a function of other predictors (packaging type, storage conditions, etc.)

Who Will Benefit

The target audience includes personnel involved in product/process development and manufacturing

  • R&D Personnel
  • Product Development Personnel
  • Quality Personnel
  • Lab Testing Personnel
  • Operations / Production Managers 
  • Quality Assurance Managers, Engineers
  • Process or Manufacturing Engineers or Managers
  • Program or Product Managers

Faculty Steven Wachs

Faculty Steven Wachs

Statistician Specializing in Product Reliability and Quality
Dexter, Michigan, United States

Steven Wachs has 25 years of wide-ranging industry experience in both technical and management positions. Steve has worked as a statistician at Ford Motor Company where he has extensive experience in the development of statistical models, reliability analysis, designed experimentation, and statistical process control.  

Steve is currently a Principal Statistician at Integral Concepts, Inc. where he assists manufacturers in the application of statistical methods to reduce variation and improve quality and productivity. He also possesses expertise in the application of reliability methods to achieve robust and reliable products as well as to estimate and reduce warranty. In addition to providing consulting services, Steve regularly conducts workshops in industrial statistical methods for companies worldwide.


RAPS - This course has been pre-approved by RAPS as eligible for up to 4 credits towards a participant's RAC recertification upon full completion.

World Compliance Seminars (WCS) is a Regulatory Affairs Professional Society (RAPS) RA Professional Development Portal provider. World Compliance Seminars is committed to enhancing the ongoing professional development of regulatory affairs professionals and other stakeholders through appropriate regulatory affairs learning activities and programs. World Compliance Seminars has agreed to follow RAPS-established operational and educational criteria

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