Predictika · Prosthetic knee fittings

An AI sales agent's Genium X4 fitting, checked before it goes out

An AI sales agent prepares a fitting request for the Ottobock Genium X4 microprocessor knee with the user's body weight and mobility grade, the amputation level, the tube adapter and the prosthetic foot. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the limits in the Genium X4 Instructions for use and returns a verdict and every reason.

Scope: Ottobock Genium X4 (3B5-4) fittings: body weight, mobility grade, amputation level, tube adapter and the prosthetic foot's size and stiffness limits. See everything this validator covers

This validator models fitting requests for the Ottobock Genium X4 microprocessor knee (3B5-4) built from its published Instructions for use for qualified personnel, not just the scenarios shown below.

  • The knee — mobility grades 2, 3 and 4; body weight up to 150 kg; indicated for knee disarticulation, transfemoral amputation and hip disarticulation; a body weight under 35 kg is a relative contraindication.
  • Tube adapter — the 2R68 (waterproof, up to 150 kg) or the 2R69 with torsion unit (up to 125 kg, not waterproof or corrosion-resistant).
  • Feet with published limits — Triton Low Profile, Taleo Adjust, Maverick Xtreme AT, Maverick Vertical Shock, FS5 Thrive and Freestyle Swim, each with the body-weight, foot-size and stiffness limits Ottobock states; feet of other manufacturers were not tested and are blocked.
  • Osseointegrated connection — connecting the knee to an osseointegrated implant system needs the implant maker's agreement and an authorized fitter, so it goes to a person for approval.

Any Genium X4 fitting that touches these rules is in scope — not only the scenarios pictured here. Not covered: other Ottobock knees (C-Leg, Genium, Kenevo and others), the other feet on Ottobock's approved list that have no size table in this document, flexion-stop and alignment choices, and prices (Ottobock does not publish list prices for this product, so this validator produces no price build-up or line-item quote).

The AI sales agentBuilds the knee fitting request from the conversation and says it is ready.
Predictika validatorChecks every rule at once and returns the verdict, each finding, and the computed figures.

7 scenarios in 3 groups · each group runs from the agent’s first attempt to the outcome · click one to switch

What the agent proposes

The AI sales agent says

Illustrative agent statement. The validator receives the structured request below.

Proposing agent: AI sales agent (scripted)

Before sending, the agent must call Recorded run

Predictika validator


      

        
        
        
      

      
Waiting for the call.

      
    

  

  
  

    
Where rules-based CPQ gets it wrong
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Our assessment of what a typical rules-based CPQ (product rules, price rules and validation rules, as in Salesforce CPQ) does with the same cases. It is a judgment about effort and reliability, not a claim that nothing can be built.

    
What the validator caughtTypical rules-based CPQPredictika
A foot approved only for some weights and sizesOnly with workarounds
Each foot has its own weight bands, size range and stiffness cap, and the limits interact (a larger size needs a lower stiffness at higher weight), so a rules-based setup needs a block of cross-field rules per foot that is easy to get subtly wrong.		Weight, foot, size and stiffness are in one request and every foot's limits are checked together on every call.
A tube adapter that caps body weight and rules out waterOnly with care
A product rule links the adapter to the weight on one line and to the water exposure on another; it works, but each new adapter or limit is more rules to maintain.		The adapter, the weight and the water exposure travel in one request and are checked with everything else.
A foot that is not approved at a given mobility gradeOnly with care
A per-foot rule that must be written and maintained for each part.		The foot and the mobility grade are compared on every call, in any order.
Every problem returned in one answerOnly with workarounds
Rules tend to fire as the request is saved or a step is completed, so a person often fixes one error and meets the next.		All findings come back together, whatever order the choices arrived in.

  

  

    
What this validator catches: findings from its test cases
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Every rule is checked on every call, in any order the choices arrive; one problem never hides another. Blocking findings stop the quote; approval findings need a person to sign off; everything else is computed.

    
1A body weight of 151 kg is over the 150 kg maximum for the Genium X4.
2The Genium X4 is recommended for mobility grades 2, 3 and 4; the quote has grade 1.
3The Genium X4 is recommended for mobility grades 2, 3 and 4; the quote has grade 5.
4The Genium X4 is indicated for knee disarticulation, transfemoral amputation or hip disarticulation; a transtibial level is not an indication.
5The 2R69 tube adapter with torsion unit is approved up to 125 kg; the body weight is 126 kg.
6The user needs water exposure, but the 2R69 tube adapter with torsion unit is not waterproof or corrosion-resistant; the waterproof adapter is the 2R68.
7Ottobock lists approved feet for the Genium X4 and states that components of other manufacturers were not tested.
8The Taleo Adjust foot is approved for mobility grades 2 to 3 only; the quote has grade 4.
9A Triton Low Profile foot of size 20 cm is not approved for a body weight of 90 kg (21 to 30 cm up to 125 kg, 21 to 28 cm from 126 to 150 kg).
10A Triton Low Profile foot of size 29 cm is not approved for a body weight of 126 kg (21 to 30 cm up to 125 kg, 21 to 28 cm from 126 to 150 kg).
11A Maverick Xtreme AT foot of size 31 cm and stiffness 5 is not approved for a body weight of 100 kg (up to 125 kg: size up to 30, stiffness up to 9; 126 to 150 kg: size up to 27 at stiffness 9, or up to 28 at stiffness 7).
12A Maverick Xtreme AT foot of size 28 cm and stiffness 8 is not approved for a body weight of 140 kg (up to 125 kg: size up to 30, stiffness up to 9; 126 to 150 kg: size up to 27 at stiffness 9, or up to 28 at stiffness 7).
13A Maverick Vertical Shock foot of size 29 cm and stiffness 9 is not approved for a body weight of 130 kg (up to 130 kg: size up to 30, stiffness up to 8; 131 to 147 kg: size up to 29, stiffness up to 9; above 147 kg not approved).
14A Maverick Vertical Shock foot of size 27 cm and stiffness 5 is not approved for a body weight of 148 kg (up to 130 kg: size up to 30, stiffness up to 8; 131 to 147 kg: size up to 29, stiffness up to 9; above 147 kg not approved).
15An FS5 Thrive foot of size 27 cm and stiffness 5 is not approved for a body weight of 126 kg (up to 125 kg: size up to 31; 126 to 150 kg: size up to 26; stiffness up to 9).
16The Freestyle Swim foot is not approved with the Genium X4 above 100 kg; the body weight is 101 kg.

  

  

    
Scenarios and results
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The recorded result of the validator for each scenario on this page: the request the AI agent sent, the verdict, and every finding, in the order they appear above.

    
1. Tube adapter and water: A 130 kg user with the torsion tube adapter and water exposure

    
The agent's request. Please quote a Genium X4 fitting for a user weighing 130 kg at mobility grade 3 with a transfemoral amputation, connected to a socket, using the 2R69 tube adapter (with torsion unit) and a Triton Low Profile foot of size 27 cm. The user will be exposed to water. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Weight above the tube adapter limit. The 2R69 tube adapter with torsion unit is approved up to 125 kg; the body weight is 130 kg.
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  • Tube adapter with torsion is not waterproof. The user needs water exposure, but the 2R69 tube adapter with torsion unit is not waterproof or corrosion-resistant; the waterproof adapter is the 2R68.
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2. Tube adapter and water: The agent resubmits after fixing the errors

    
The agent's request. Please quote a Genium X4 fitting for a user weighing 130 kg at mobility grade 3 with a transfemoral amputation, connected to a socket, using the 2R68 tube adapter and a Triton Low Profile foot of size 27 cm. The user will be exposed to water. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Fitting summary. Body weight 130 kg against a limit of 150 kg for the Genium X4 with this tube adapter, mobility grade 3.
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3. Foot size, stiffness and tube adapter: A 140 kg user with a Maverick Xtreme AT foot

    
The agent's request. Please quote a Genium X4 fitting for a user weighing 140 kg at mobility grade 4 with a transfemoral amputation, connected to a socket, using the 2R69 tube adapter (with torsion unit) and a Maverick Xtreme AT foot of size 30 cm and stiffness 9. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Weight above the tube adapter limit. The 2R69 tube adapter with torsion unit is approved up to 125 kg; the body weight is 140 kg.
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  • Maverick Xtreme AT size or stiffness not approved. A Maverick Xtreme AT foot of size 30 cm and stiffness 9 is not approved for a body weight of 140 kg (up to 125 kg: size up to 30, stiffness up to 9; 126 to 150 kg: size up to 27 at stiffness 9, or up to 28 at stiffness 7).
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4. Foot size, stiffness and tube adapter: The agent resubmits after fixing the errors

    
The agent's request. Please quote a Genium X4 fitting for a user weighing 140 kg at mobility grade 4 with a transfemoral amputation, connected to a socket, using the 2R68 tube adapter and a Maverick Xtreme AT foot of size 28 cm and stiffness 9. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Maverick Xtreme AT size or stiffness not approved. A Maverick Xtreme AT foot of size 28 cm and stiffness 9 is not approved for a body weight of 140 kg (up to 125 kg: size up to 30, stiffness up to 9; 126 to 150 kg: size up to 27 at stiffness 9, or up to 28 at stiffness 7).
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5. Foot size, stiffness and tube adapter: The agent resubmits after fixing the errors

    
The agent's request. Please quote a Genium X4 fitting for a user weighing 140 kg at mobility grade 4 with a transfemoral amputation, connected to a socket, using the 2R68 tube adapter and a Maverick Xtreme AT foot of size 28 cm and stiffness 7. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Fitting summary. Body weight 140 kg against a limit of 150 kg for the Genium X4 with this tube adapter, mobility grade 4.
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6. Osseointegrated connection: An osseointegrated fitting with a Taleo Adjust foot at mobility grade 4

    
The agent's request. Please quote a Genium X4 fitting for a user weighing 95 kg at mobility grade 4 with a transfemoral amputation, connected to an osseointegrated implant system, using the 2R68 tube adapter and a Taleo Adjust foot of size 26 cm. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Taleo Adjust not approved for grade 4. The Taleo Adjust foot is approved for mobility grades 2 to 3 only; the quote has grade 4.
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  • Osseointegrated implant connection to confirm. The knee is to connect to an osseointegrated implant system; the implant manufacturer must also permit this combination and the fitter must be authorized for the connection.
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7. Osseointegrated connection: The agent resubmits after fixing the errors

    
The agent's request. Please quote a Genium X4 fitting for a user weighing 95 kg at mobility grade 4 with a transfemoral amputation, connected to an osseointegrated implant system, using the 2R68 tube adapter and a Triton Low Profile foot of size 27 cm. It is ready to send.

    
Verdict: Needs approval.

    
    
      
  • Osseointegrated implant connection to confirm. The knee is to connect to an osseointegrated implant system; the implant manufacturer must also permit this combination and the fitter must be authorized for the connection.
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  • Fitting summary. Body weight 95 kg against a limit of 150 kg for the Genium X4 with this tube adapter, mobility grade 4.
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Narration transcript
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The text of the narrated walkthrough, step by step.

    
    
      
  1. Welcome to a demo of Predictika's Validator. An AI sales agent prepares a fitting request for the Ottobock Genium X4 microprocessor knee. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the limits in the Genium X4 Instructions for use and returns a verdict and every reason.
    2. 
      
  2. I will start with the first request by the agent.
    3. 
      
  3. The agent says. Please quote a Genium X4 fitting for a user weighing 140 kg at mobility grade 4. It is ready to send. The rest of the request is on screen.
    4. 
      
  4. Before it goes out, the agent calls the validator.
    5. 
      
  5. Blocked, with two findings, all in one answer. The 2R69 tube adapter with torsion unit is approved up to 125 kg; the body weight is 140 kg. A Maverick Xtreme AT foot of size 30 cm and stiffness 9 is not approved for a body weight of 140 kg (up to 125 kg: size up to 30, stiffness up to 9; 126 to 150 kg: size up to 27 at stiffness 9, or up to 28 at stiffness 7).
    6. 
      
  6. The validator returned two blocking findings in one answer. A check that reads one field at a time would pass most of this; it shows only when the choices in the quote are checked against each other.
    7. 
      
  7. What this shows: for a foot approved only for some weights and sizes, a rules-based CPQ can do this only with workarounds.
    8. 
      
  8. Now the agent resubmits.
    9. 
      
  9. The corrected request. It changes the tube adapter to 2R68 (waterproof) and the foot size to 28 cm.
    10. 
      
  10. It calls the validator again.
    11. 
      
  11. Still blocked, with one finding, all in one answer. A Maverick Xtreme AT foot of size 28 cm and stiffness 9 is not approved for a body weight of 140 kg (up to 125 kg: size up to 30, stiffness up to 9; 126 to 150 kg: size up to 27 at stiffness 9, or up to 28 at stiffness 7).
    12. 
      
  12. One finding cleared. Still blocking: Maverick Xtreme AT size or stiffness not approved.
    13. 
      
  13. The agent resubmits once more.
    14. 
      
  14. The revised request. It changes the foot stiffness to 7.
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  15. It calls the validator once more.
    16. 
      
  16. This time the validator clears it.
    17. 
      
  17. The earlier finding is cleared.
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  18. Two problems caught in one call, fixed in two passes, and a clean quote. That is the value of Predictika's validator: catching mistakes before they reach the customer. Now you can try the other scenarios yourself.
    19.