The engineering question
Record the exact grade, filler level, condition, temperature, test method, and whether the data is solid-state, melt-state, directional, or a supplier processing recommendation.
What to document
A generic polymer-family number is not an engineering substitute for the specified grade and condition.
Practical workflow
Use the Materials workflow before entering density, shrinkage, or cooling inputs into a calculator.
Validation boundary
Use manufacturer documentation, grade-specific supplier data, controlled process records, and trials for any equipment, quality, material, or commercial commitment. A static calculator is a transparent starting point, not a simulation or approval.