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Is there a practical example for the bundling of criteria?

Is there a practical example for the bundling of criteria?
Yes. We give a practical example of manual power and energy supply. They make us hope that the quality of the bundling and formulation of criteria will level off at a practicable level as the number of cases processed increases.

Criteria emerge from practice and repeat themselves. We expect a finite, manageable number of meta-indicators that can be traced back to the individual in terms of motor skills, cognition and sensory skills. They are reflected in frequently occurring, everyday practical actions and thus in particular in the areas of nutrition, exercise and communication/interaction.

Hand strength

Some goals - but also supposed solutions - require more than can be applied by the user. We met the criterion of manual strength in various individual cases:

  • Unlock the lock or door
  • Trigger nursing call
  • Open the cucumber jar
  • Open cans
  • Clothespin

A first attempt, the experience from different cases leads to the following structure and everyday practical test questions, which can be used both in resource-related needs assessment and to describe a solution. The following questions about the needs assessment also apply to the description of solutions: "All people who can open a water bottle can (in terms of manual strength!) Also use the solution".

  • Can the required force be applied?
    • Can water bottles be opened?
    • Can cucumber jars be opened?
    • Can the door lock be unlocked?
    • Can clothes pegs be pressed together?
    • Can the light switch be operated?
  • Can the required force be transferred sufficiently?
    • Can a water bottle be opened with a handle?
    • Can a mixed pickles jar be opened with a handle?
  • Do pain prevent the necessary force from being applied?
    • Pain occurs when using force.
    • Pain occurs when moving.
    • Pain occurs in certain positions.

On the one hand, across the various individual cases, it can be seen that individual statements are mentioned several times. On the other hand, several criteria are repeatedly effective. The criterion of manual strength is repeatedly linked to the criterion of fine motor skills (unlocking the door, triggering a care call, opening the cucumber jar). This could be used to map items at different levels:

  • to eat and drink
    • Can a water bottle be opened?
    • Due to mobility?
      • Caused by fine and gross motor skills?
      • Due to hand strength?
      • Which of the following activities can be carried out:
        • Open the water tab
        • Open the preserving jar
        • Unlock the door lock
        • Squeeze clothespins
        • Operate the light switch

power supply

The topic of energy supply is important for various solutions (care call, night light, motorized lock, motorized can and glass opener). It leads to the following topics:

  • Power supply failure: What happens if the power fails?
  • Switching on and off: Does a solution have to be switched on and off or brought from standby?
  • Reactivation: Do batteries need to be procured, charged or replaced? Are they available?
  • Explosion hazard: Are there additional risks or fears, for example due to a battery fire?



From our experience, the topic of energy supply could be structured as follows:

  • power supply
    • Kinetic energy
    • electrical power
      • Mains operation
        • Plug type (Schuko, Euro, ...)
        • Operating voltage (230V, 12V, 9V, 5V)
      • Energy harvesting
        • Solar cells
        • Piezo elements
        • Induction voltage through movement
      • Batteries
        • Sustainability (rechargeable, disposable)
        • Type (9V block, AA, AAA, CR2032, ...)

The question of what level of detail is necessary concerns the central research question. WiQQi should help to simplify research - but not to make it more complex.

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