Creascience, Melbourne
may 10 2006
- General Overview of Shelf-Life
- What is Shelf-Life?
- Why Study Shelf-Life?
- Objectives of Shelf-Life Studies
- What are Stability Studies?
- Difference between Shelf-Life and Stability Studies
- Introduction to Life Data
- What are Life Data?
- Defining the Event of Interest that Causes the Failure of the Product
- Particularities of Life Data: Censoring, Truncation
- Impact of Statistical Analysis
- Typical Layout of Results
- Designing Efficient Studies
- Definition of Study : Objective, Feasibility, Study and Control Populations
- Identification and Selection of Variables and other Measurement Issues: Impact of End of Study Time, Censoring, Competing Risks, Destructive and Non-destructive Testing, Sample Variability
- Experimental Design, Sample Definition, Sample Selection, Sample Size and Statistical Power, Problems Specific to Sensory Evaluation, Dynamic Designs
- Statistical Analysis of Life Data
- Estimating Time to Event
- Analyzing Time to Event Data to Estimate Shelf-Life: Survival Curves
- Reasons Why Usual Analysis Methods (ANOVA, Standard Regression) Fail
- Goals of Survival Analysis
- Non-Parametric Survival Curve Estimation: Kaplan - Meier
- Parametric Survival Curve Estimation
- Semi-Parametric Survival Curve Estimation: Cox Regression
- A Note on Real-Time vs. Accelerated Testing
- Why Accelerated Shelf-Life Testing (ASLT) Models?
- Principle of ASLT
- Key to successful ASLT
- Problems in ASLT
- Software
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