Updated 11/28/2023

Why a water fine filter can result in problems

Functional Modeling #

The system:

Water that is used for washing high-purity products.


Too many particles percent in the water

Possible solution:

Add a filter. The manager requested to add 10 nm filter to be in the sequence to the 100nm filter. It is expected that the proposed change will improve a particle performance

Real problem:

To define what is the real risk, create a model of the failure and generate a mitigation/failure prevention

Functional rank
Problematic rank
Filter 100nm
H2O agglomerates
H2O Molecules
Filter 10nm
Fittings and all the parts of the system

Molecules of water create agglomerates having a size of tens mn. The number of free H2O molecules defines the water activity. The fine filter destroys the agglomerates and increases the number of free molecules H2O that increases the water activity - high interaction rate, high evaporation rate, etc. The elevated activity of the water may result in the dissolution and precipitation of new defects and particles. To ensure successful performance 40 Inventive principles should be enrolled to find a solution to the problem

Dec 10 2021 2:27:28 pm
Inventive principles #
If I use a very fine filter
The purity of the water will be improved - the water will be pure from particles
The agglomerates of the water will be destroyed and the activity on the water will be increased
Contradiction notes:
The more the free water molecules H2O the higher the activity of the water
Improving parameter
Description of what is improving:
Purity of the water - no particles - no other parts within the water
Selected improving parameter:
Worsening parameter
Description of what is worsening:
The activity of the water will be increased
Selected worsening parameter:
Matching principles:
  • 10
    Preliminary action
  • 20
    Continuity of useful action
  • 35
    Parameter changes
  • Dec 10 2021 2:55:31 pm
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