P09045: Membrane Characterization Test Stand

Identify Customer Needs

Table of Contents

Step 1. Gather Raw Data From Customers

Develop a test fixture that can gather data that can be made into a stress/strain correlation. Possible options are a biaxial tester or a pressure expansion tester.

Things to consider:

  1. Need a method to measure load/displacement, whether load is a pressure or a force
  2. Current material being tested is incompressible
  3. Current membrane tester using an indenter point load. Quantifying hyperelastic materials using this type of testing is challenging

Interviewing process skipped over because customer is lead engineer.

Step 2. Interpret Raw Data in Terms of Customer Needs

  1. Collect some form of load and displacement data (results that can be used to characterize mechanical properties - could be force, pressure, 1-D deflection, 2-D deflection field, or something else entirely)
  2. Test both polymeric materials and tissue samples
  3. Test a variety of membrane diameters and thicknesses
  4. Minimal sample prep
  5. Small footprint
  6. Collect continuous data (as opposed to only start and finish points)

Step 3. Organize the Needs into a Hierarchy

Step 4. Establish the Relative Importance of the Needs

Finalized Customer Needs

Finalized Customer Needs

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