Predictika · Wrecker bodies on customer chassis

An AI sales agent's wrecker order, checked against the published chassis requirements before it goes out

An AI sales agent prepares an order for a Century or Vulcan wrecker body to be mounted on a customer-selected chassis, with the chassis figures, body, boxes, outriggers and the loads the buyer needs to tow and lift. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the specifications published on the Miller Industries product pages and returns a verdict, every reason and the figures it computed.

Scope: Century / Vulcan wrecker orders (2465, 3212 G2, 4024, 5130 and 7035) on a customer chassis: chassis requirements, bodies, saddle and tunnel boxes, outriggers, tow and underlift loads. See everything this validator covers

This validator models orders for five Century and Vulcan wreckers, the Century 2465 / Vulcan V-24, 3212 G2, 4024, 5130 and 7035, not just the scenarios shown below.

  • Chassis — each model has its own published chassis figures: GVWR range for the 3212 G2 (and a suggested range for the 2465), clear cab-to-axle limits, maximum frame height and tire size for the 2465 and 3212 G2, and axle ratings, resisting bending moment and after-frame length for the 4024, 5130 and 7035 (including the 7035 SP 850-XP column).
  • Bodies and boxes — the 3212 G2 body choices, the saddle or tunnel box sizes published for each model, and the rule that 3212 G2 saddle boxes go with the Century body and not the optional CX2 body.
  • Outriggers — the outrigger type on each model's published option list; any other type goes to a person to confirm.
  • Tow and underlift loads — the load the buyer needs to tow and to lift with the underlift, compared with the model's published tow rating and retracted underlift capacity.

Any order for these five wreckers that touches these rules is in scope — not only the scenarios pictured here. Not covered: prices (Miller Industries does not publish prices on these pages, so this validator produces no price build-up), other Miller Industries models such as carriers and rotators, the many other options, and chassis make and model compatibility. Miller notes that its ratings are based on structural factors only, not vehicle capacities, and that the chassis figures are recommendations or minimums that may need to be heavier for a given chassis; tire size is compared by width only.

The AI sales agentBuilds the wrecker 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
Chassis figures that differ for every modelOnly with care
A set of ranges and minimums per model, each written and kept up to date as a separate rule.		The model and every chassis figure are in one request and checked together on every call.
A body that decides which boxes are availableOnly with care
The saddle box depends on the body choice on another line, so it needs a cross-line rule for each body.		The body and the box are compared on every call, in any order.
The buyer's tow and lift loads against the model's ratingsOnly with care
The load is a customer figure that must be compared with a per-model rating, one rule per model.		The loads travel with the order and are compared with the published ratings of the chosen model.
Limits that only call for a person to confirmOnly with workarounds
A suggested range or an unlisted option usually becomes a hard stop, or is not checked at all, unless a separate approval path is built.		The validator returns Needs approval with the reason, and keeps Block for the hard limits.
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 chassis front axle is rated 13,200 lbs; the published chassis recommendation (a minimum) is 14,600 lbs.
2The chassis has a resisting bending moment of 3,000,000 in-lbs; the published chassis recommendation (a minimum) is 3,500,000 in-lbs.
3The SP 850-XP chassis column is published only for the Century 7035.
4The quote needs to tow 20,001 lbs; the published tow rating of this model is 20,000 lbs.
5The quote needs an underlift of 12,001 lbs; the published retracted underlift capacity of this model is 12,000 lbs.
6The chassis has a GVWR of 26,499 lbs; the published chassis requirement is 26,500 to 31,000 lbs.
7The chassis has a GVWR of 31,001 lbs; the published chassis requirement is 26,500 to 31,000 lbs.
8The chassis has a clear cab-to-axle of 83 in; the published minimum for this model is 84 in.
9The chassis has a clear cab-to-axle of 139 in; the published maximum for this model is 138 in.
10The chassis frame height is 41 in; the published maximum for this model is 40 in.
11The chassis has 295 mm wide tires; the published maximum tire size for this model is 275 mm wide (on 22.5 in wheels).
12The 3212 G2 is published with a Century 84 in, Vulcan 120 or 136 in, low profile 120 or 138 in, or CX2 body; none is selected.
13The 3212 G2 saddle boxes are published for the Century body, and not with the optional CX2 body.
14A 30 in saddle or tunnel box is not among the sizes published for this model.
15The requested rear outriggers are not on the published option list for this model; a person should confirm they can be supplied.
16The chassis GVWR is 20,999 lbs; Miller suggests 21,000 to 31,000 lbs, so a person should confirm the chassis.
17The chassis GVWR is 31,001 lbs; Miller suggests 21,000 to 31,000 lbs, so a person should confirm the chassis.
18The 2465 is published for a clear cab-to-axle of 84 in or 108 in; the chassis has 96 in.
19The chassis frame height is 38 in; the published maximum for this model is 37 in.
20The chassis has 275 mm wide tires; the published maximum tire size for this model is 255 mm wide (on 22.5 in wheels).

  

  

    
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. Medium duty wrecker: Century 3212 G2 with a Vulcan body on a chassis outside the published limits

    
The agent's request. Please quote a Century 3212 G2 wrecker with the Vulcan 120 in aluminum modular body, mounted on a chassis with a GVWR of 24,000 lbs, a clear cab-to-axle of 140 in, a frame height of 38 in and 295 mm wide tires and a resisting bending moment of 1,250,000 in-lbs, for a buyer who needs to tow up to 36,000 lbs and lift up to 10,000 lbs on the underlift, with a 36 in saddle or tunnel box and hydraulic rear outriggers. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Heaviest tow load above the tow rating. The quote needs to tow 36,000 lbs; the published tow rating of this model is 32,000 lbs.
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  • Chassis GVWR outside the required range. The chassis has a GVWR of 24,000 lbs; the published chassis requirement is 26,500 to 31,000 lbs.
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  • Cab-to-axle longer than the maximum. The chassis has a clear cab-to-axle of 140 in; the published maximum for this model is 138 in.
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  • Tire width above the maximum tire size. The chassis has 295 mm wide tires; the published maximum tire size for this model is 275 mm wide (on 22.5 in wheels).
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  • Saddle box needs the Century body on the 3212 G2. The 3212 G2 saddle boxes are published for the Century body, and not with the optional CX2 body.
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  • Outrigger type not on the published option list. The requested rear outriggers are not on the published option list for this model; a person should confirm they can be supplied.
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2. Medium duty wrecker: The agent resubmits after fixing the errors

    
The agent's request. Please quote a Century 3212 G2 wrecker with the Century 84 in aluminum modular body, mounted on a chassis with a GVWR of 28,000 lbs, a clear cab-to-axle of 120 in, a frame height of 38 in and 275 mm wide tires and a resisting bending moment of 1,250,000 in-lbs, for a buyer who needs to tow up to 30,000 lbs and lift up to 10,000 lbs on the underlift, with a 36 in saddle or tunnel box and manual rear outriggers. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. Century 3212 G2 / V-30 / 1016: tow rating 32,000 lbs, retracted underlift 12,000 lbs, chassis GVWR 28,000 lbs.
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3. Heavy duty wrecker: Century 5130 on a chassis below its published recommendations

    
The agent's request. Please quote a Century 5130 wrecker, mounted on a chassis with a 11,000 lb front axle and a 21,000 lb rear axle, a clear cab-to-axle of 150 in, a resisting bending moment of 2,000,000 in-lbs and 36 in of frame behind the rear axle, for a buyer who needs to tow up to 85,000 lbs and lift up to 30,000 lbs on the underlift, with a 40 in saddle or tunnel box. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Heaviest tow load above the tow rating. The quote needs to tow 85,000 lbs; the published tow rating of this model is 80,000 lbs.
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  • Cab-to-axle shorter than the minimum. The chassis has a clear cab-to-axle of 150 in; the published minimum for this model is 156 in.
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  • Front axle below the chassis recommendation. The chassis front axle is rated 11,000 lbs; the published chassis recommendation (a minimum) is 12,000 lbs.
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  • Resisting bending moment below the recommendation. The chassis has a resisting bending moment of 2,000,000 in-lbs; the published chassis recommendation (a minimum) is 2,570,000 in-lbs.
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  • After-frame length below the recommendation. The chassis has 36 in of frame behind the rear axle; the published chassis recommendation (a minimum) is 40 in.
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  • Saddle or tunnel box size not offered. A 40 in saddle or tunnel box is not among the sizes published for this model.
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4. Heavy duty wrecker: The agent resubmits after fixing the errors

    
The agent's request. Please quote a Century 5130 wrecker, mounted on a chassis with a 12,000 lb front axle and a 21,000 lb rear axle, a clear cab-to-axle of 160 in, a resisting bending moment of 2,570,000 in-lbs and 40 in of frame behind the rear axle, for a buyer who needs to tow up to 75,000 lbs and lift up to 30,000 lbs on the underlift, with a 36 in saddle or tunnel box. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. Century 5130: tow rating 80,000 lbs, retracted underlift 35,000 lbs.
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5. Light duty wrecker: Century 2465 with a long list of chassis and option problems

    
The agent's request. Please quote a Century 2465 / Vulcan V-24 wrecker, mounted on a chassis with a GVWR of 33,000 lbs, a clear cab-to-axle of 96 in, a frame height of 38 in and 275 mm wide tires, for a buyer who needs to tow up to 22,000 lbs and lift up to 7,000 lbs on the underlift, with a 36 in saddle or tunnel box and manual rear outriggers. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Heaviest tow load above the tow rating. The quote needs to tow 22,000 lbs; the published tow rating of this model is 20,000 lbs.
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  • Cab-to-axle not offered on the 2465. The 2465 is published for a clear cab-to-axle of 84 in or 108 in; the chassis has 96 in.
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  • Frame height above the maximum. The chassis frame height is 38 in; the published maximum for this model is 37 in.
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  • Tire width above the maximum tire size. The chassis has 275 mm wide tires; the published maximum tire size for this model is 255 mm wide (on 22.5 in wheels).
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  • Saddle or tunnel box size not offered. A 36 in saddle or tunnel box is not among the sizes published for this model.
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  • Chassis GVWR outside the suggested range. The chassis GVWR is 33,000 lbs; Miller suggests 21,000 to 31,000 lbs, so a person should confirm the chassis.
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  • Outrigger type not on the published option list. The requested rear outriggers are not on the published option list for this model; a person should confirm they can be supplied.
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6. Light duty wrecker: The agent resubmits after fixing the errors

    
The agent's request. Please quote a Century 2465 / Vulcan V-24 wrecker, mounted on a chassis with a GVWR of 33,000 lbs, a clear cab-to-axle of 108 in, a frame height of 36 in and 255 mm wide tires, for a buyer who needs to tow up to 20,000 lbs and lift up to 7,000 lbs on the underlift, with a 24 in saddle or tunnel box and manual rear outriggers. It is ready to send.

    
Verdict: Needs approval.

    
    
      
  • Chassis GVWR outside the suggested range. The chassis GVWR is 33,000 lbs; Miller suggests 21,000 to 31,000 lbs, so a person should confirm the chassis.
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  • Outrigger type not on the published option list. The requested rear outriggers are not on the published option list for this model; a person should confirm they can be supplied.
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  • Order summary. Century 2465 / Vulcan V-24: tow rating 20,000 lbs, retracted underlift 9,000 lbs, chassis GVWR 33,000 lbs.
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7. Light duty wrecker: The agent resubmits after fixing the errors

    
The agent's request. Please quote a Century 2465 / Vulcan V-24 wrecker, mounted on a chassis with a GVWR of 28,000 lbs, a clear cab-to-axle of 108 in, a frame height of 36 in and 255 mm wide tires, for a buyer who needs to tow up to 20,000 lbs and lift up to 7,000 lbs on the underlift, with a 24 in saddle or tunnel box. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Order summary. Century 2465 / Vulcan V-24: tow rating 20,000 lbs, retracted underlift 9,000 lbs, chassis GVWR 28,000 lbs.
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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 Century or Vulcan wrecker body to be mounted on a customer-selected chassis. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the specifications published on the Miller Industries product pages and returns a verdict, every reason and the figures it computed.
    2. 
      
  2. I will start with the first request by the agent.
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  3. The agent says. Please quote a Century 5130 wrecker, mounted on a chassis with a 11,000 lb front axle and a 21,000 lb rear axle. It is ready to send. The rest of the request is on screen.
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  4. Before it goes out, the agent calls the validator.
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  5. Blocked, with six findings, all in one answer. The quote needs to tow 85,000 lbs; the published tow rating of this model is 80,000 lbs. The chassis has a clear cab-to-axle of 150 in; the published minimum for this model is 156 in. The chassis front axle is rated 11,000 lbs; the published chassis recommendation (a minimum) is 12,000 lbs. The other three are on screen.
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  6. The validator returned six 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 the buyer's tow and lift loads against the model's ratings, 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 front axle rating to 12,000 lbs, the clear cab-to-axle to 160 in, the resisting bending moment to 2570000 and the frame behind rear axle to 40 in. Two more changes are on screen.
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  10. It calls the validator again.
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  11. This time the validator clears it.
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  12. All six earlier findings are cleared.
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  13. Six problems caught in one call, fixed in one pass, 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.
    14.