Predictika · Trailer axle orders

An AI sales agent's trailer axle order, checked before it goes out

An AI sales agent prepares an order for a trailer axle with its wheel brake, tyre size and steering variant, and quotes the first digits of the item number. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the published axle code rules and returns a verdict, every reason and the figures it computed.

Scope: Trailer axle orders in the ECO Plus 3 item number key: design, axle load, wheel brake, tyre size, steering variant and the quoted item number digits. See everything this validator covers

This validator models the published item number key for ECO Plus 3 axles, not just the scenarios shown below.

  • Item number key — the design digits (rigid, rigid solid, stub, swivel and steering axle), the load digits for 6,500 kg and 9,000 kg axles and the brake digits for the eleven wheel brake options; the validator computes the digits and compares them with the ones the order states.
  • Brake and tyre pairing — the tyre sizes the type code table lists for each drum brake (SN 300, SN 360, SN 420) and disc brake (TSB and TS2 3709 and 4309); the TSB 4312 disc brake is flagged because the item number key has no digit for it.
  • Steering axles — the maximum steering angle of the power steering (45 degrees), self steering LL (27 degrees) and self steering LS (20 degrees) series, and that these series belong on a steering axle design.
  • Heavier axles — ECO Plus 3 for 10 to 12 t axles launched in January 2023, but the item number key read here lists no load digits for it, so an order for one is flagged for a person to confirm with the manufacturer.

Any order for these axles that touches these rules is in scope — not only the scenarios pictured here. Not covered: prices (the documents read list none, so there is no price build-up or line-item quote), full item numbers beyond the first six digits, axle beams and series letters, suspensions and air suspension modules, track and spring centers, hub and wheel stud options, and other BPW products and documents.

The AI sales agentBuilds the axle order 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
An item number whose digits must agree with design, load and brakeOnly with workarounds
The digits the rep types are a free-entry field; a rule per digit and per option is needed to compare them with the selected options.		The digits are computed from the selected options on every call and compared with the ones the order states.
A tyre size that only fits some wheel brakesOnly with care
A product rule per brake and tyre size. It works, but every brake added is another set of pairings to maintain.		Brake and tyre size are in one request and every pairing is checked together.
A steering angle limit that depends on the steering seriesOnly with care
The limit depends on the series chosen on another line, so each series needs its own validation rule.		The angle limit is looked up from the series and compared with the stated angle in the same call.
An option that exists in one document but has no item number digitOnly with workarounds
Nothing in the option list says that a brake is missing from the numbering key; it is found when the order is rejected downstream.		The brake is flagged at once, with the reason, before the order goes out.
Every problem returned in one answerOnly with workarounds
Rules tend to fire as the order is saved or a step is completed, so a rep 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.

    
1The tyre size on the order is not one the BPW type code table lists for the selected wheel brake (SN 300: 15 and 17.5 inch; SN 360: 19.5 inch; SN 420: 20 to 24 inch; TSB 3,709: 19.5 inch; TS2 3,709: 19.5 and 22.5 inch; TSB and TS2 4,309: 22.5 inch).
2The item number digits on the order do not match the selected design, load and brake; the BPW key gives 20, 68 and 0 (a brake digit of 0 stands for 00, without brake).
3The TSB 4,312 disc brake appears in the BPW type code table but has no brake digit in the ECO Plus 3 item number key, which lists SN 3,015, 3,020, 3,620, 4,212, 4,218, 4,220 and the TSB and TS2 3,709 and 4,309 brakes.
4ECO Plus 3 for 10 to 12 t axles was introduced in January 2,023, but the BPW item number key read here lists load digits only for 6,500 kg and 9,000 kg; a person should confirm the item number with BPW.
5The item number digits on the order do not match the selected design, load and brake; the BPW key gives 20, 68 and 31 (a brake digit of 0 stands for 00, without brake).
6The order states a steering angle of 46 degrees but the selected steering axle series allows at most 45 degrees.
7The order states a steering angle of 28 degrees but the selected steering axle series allows at most 27 degrees.
8The order states a steering angle of 21 degrees but the selected steering axle series allows at most 20 degrees.
9The power steering and self steering series (L, LL, LS) are steering axle series; the selected axle design is not a steering axle.
10The order states a steering angle of 30 degrees but the selected steering axle series allows at most 27 degrees.
11The item number digits on the order do not match the selected design, load and brake; the BPW key gives 20, 66 and 31 (a brake digit of 0 stands for 00, without brake).
12The item number digits on the order do not match the selected design, load and brake; the BPW key gives 21, 68 and 10 (a brake digit of 0 stands for 00, without brake).
13The order states a steering angle of 25 degrees but the selected steering axle series allows at most 20 degrees.

  

  

    
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. Disc brake and tyre size: A 9 t rigid axle with a TS2 4309 disc brake and 19.5 inch tyres

    
The agent's request. Please quote a 9,000 kg rigid axle with a TS2 4309 disc brake and 19.5 inch tyres. The item number begins 20.68.43. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Tyre size not listed for the brake. The tyre size on the order is not one the BPW type code table lists for the selected wheel brake (SN 300: 15 and 17.5 inch; SN 360: 19.5 inch; SN 420: 20 to 24 inch; TSB 3,709: 19.5 inch; TS2 3,709: 19.5 and 22.5 inch; TSB and TS2 4,309: 22.5 inch).
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2. Disc brake and tyre size: The agent resubmits after fixing the errors

    
The agent's request. Please quote a 9,000 kg rigid axle with a TS2 4309 disc brake and 22.5 inch tyres. The item number begins 20.68.43. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Item number summary. The item number begins with design digits 20, load digits 68 and brake digits 43 (a brake digit of 0 stands for 00, without brake).
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3. Steering axle: A self steering axle with a 35 degree angle and rigid axle digits

    
The agent's request. Please quote a 9,000 kg steering axle with a SN 3620 drum brake and 19.5 inch tyres, self steering series LL at 35 degrees steering angle. The item number begins 20.68.20. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Stated item number digits differ. The item number digits on the order do not match the selected design, load and brake; the BPW key gives 29, 68 and 20 (a brake digit of 0 stands for 00, without brake).
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  • Steering angle above the series limit. The order states a steering angle of 35 degrees but the selected steering axle series allows at most 27 degrees.
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4. Steering axle: The agent resubmits after fixing the errors

    
The agent's request. Please quote a 9,000 kg steering axle with a SN 3620 drum brake and 19.5 inch tyres, self steering series LL at 27 degrees steering angle. The item number begins 20.68.20. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Stated item number digits differ. The item number digits on the order do not match the selected design, load and brake; the BPW key gives 29, 68 and 20 (a brake digit of 0 stands for 00, without brake).
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5. Steering axle: The agent resubmits after fixing the errors

    
The agent's request. Please quote a 9,000 kg steering axle with a SN 3620 drum brake and 19.5 inch tyres, self steering series LL at 27 degrees steering angle. The item number begins 29.68.20. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Item number summary. The item number begins with design digits 29, load digits 68 and brake digits 20 (a brake digit of 0 stands for 00, without brake).
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6. Heavier axle and brake: A 10 to 12 t axle with a TSB 4312 disc brake

    
The agent's request. Please quote a 10 to 12 t rigid axle with a TSB 4312 disc brake and 22.5 inch tyres. The item number begins 20.68.00. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Brake without an ECO Plus 3 item number digit. The TSB 4,312 disc brake appears in the BPW type code table but has no brake digit in the ECO Plus 3 item number key, which lists SN 3,015, 3,020, 3,620, 4,212, 4,218, 4,220 and the TSB and TS2 3,709 and 4,309 brakes.
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  • ECO Plus 3 for 10 to 12 t has no digits in the key. ECO Plus 3 for 10 to 12 t axles was introduced in January 2,023, but the BPW item number key read here lists load digits only for 6,500 kg and 9,000 kg; a person should confirm the item number with BPW.
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7. Heavier axle and brake: The agent changes the order to a 9 t axle with a TSB 4309 disc brake

    
The agent's request. Please quote a 9,000 kg rigid axle with a TSB 4309 disc brake and 22.5 inch tyres. The item number begins 20.68.41. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Item number summary. The item number begins with design digits 20, load digits 68 and brake digits 41 (a brake digit of 0 stands for 00, without brake).
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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 an order for a trailer axle with its wheel brake, tyre size and steering variant, and quotes the first digits of the item number. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the published axle code rules and returns a verdict, every reason and the figures it computed.
    2. 
      
  2. I will start with the first request by the agent.
    3. 
      
  3. The agent says. Please quote a 9,000 kg steering axle with a SN 3620 drum brake and 19.5 inch tyres, self steering series LL at 35 degrees steering angle. The item number begins 20.68.20. 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 item number digits on the order do not match the selected design, load and brake; the BPW key gives 29, 68 and 20 (a brake digit of 0 stands for 00, without brake). The order states a steering angle of 35 degrees but the selected steering axle series allows at most 27 degrees.
    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.
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  7. What this shows: for a steering angle limit that depends on the steering series, a rules-based CPQ is error-prone for this.
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  8. Now the agent resubmits.
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  9. The corrected request. It changes the steering angle to 27 degrees.
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  10. It calls the validator again.
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  11. Still blocked, with one finding, all in one answer. The item number digits on the order do not match the selected design, load and brake; the BPW key gives 29, 68 and 20 (a brake digit of 0 stands for 00, without brake).
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  12. One finding cleared. Still blocking: stated item number digits differ.
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  13. The agent resubmits once more.
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  14. The revised request. It changes the item number begins to 29.68.20.
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  15. It calls the validator once more.
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  16. This time the validator clears it.
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  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.