Predictika · Specialty tractor quotes

An AI sales agent's REX4 tractor quote, checked before it goes out

An AI sales agent prepares a quote for a Landini REX4 specialty tractor: the version and model, engine power, transmission, trim level, axle, tyres, hitch and PTO options, and the figures the quote states. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the REX4 brochure Landini publishes and returns a verdict, every reason and the figures it computed.

Scope: Landini REX4 Cab (F, S, V, GT) and Platform (F, GE, GB, GT) tractors, 4-080 to 4-120 (brochure 02/2025): model and version, transmission, trim levels, axle, tyres, hitch and PTO dependencies, and stated power, torque, wheelbase, gears and oil take-out. No prices. See everything this validator covers

This validator models the REX4 range described in the public Landini brochure, not just the scenarios shown below.

  • Version and model — the Cab version comes as F, S, V and GT, the Platform version as F, GE, GB and GT; RoboShift is listed for the Cab version and T-Tronic for the Platform version.
  • Trim levels — Dynamic and Dynamic + (Cab) include the RoboShift transmission, reverse power shuttle and electronically controlled rear hitch; Dynamic + adds rear electrohydraulic remotes.
  • Axle, tyres and weights — the suspended front axle is offered for F, S and GT; each model has its own rear tyre range and front weight sets; front wet brakes need Hydra-Lock and are not offered on the V.
  • Hitch, PTO and hydraulics — Auto PTO needs the electronic rear hitch, the electrohydraulic PTO clutch is listed with the power shuttle, assistor rams are for the GT, front hitch, front PTO, front ISOBUS and front quick couplings are listed per model or version.
  • Stated figures — maximum power and torque per engine rating, wheelbase, forward gears and hydraulic oil take-out are compared with the quote, and the market-dependent Fleet and Farm Pro Pack needs a person to confirm.

Any REX4 tractor quote that touches these rules is in scope — not only the scenarios pictured here. Not covered: prices (none are in the brochure), other Landini ranges, McCormick tractors, implements, and options not named above. The brochure states that data can change without notice, so the model reflects the brochure read in October 2026.

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

6 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 model, tyre, weight or option the brochure does not list for that versionOnly with care
A per-model availability table that must be written and kept up to date for each of six models and two versions.		The version, model and every option are in one request and checked together on every call.
An option that depends on another (Auto PTO, PTO clutch, trim contents)Only with care
Each dependency is its own product rule, and rules across versions and models multiply.		Dependencies are checked on every call, in any order the choices arrive.
A stated power, torque, gear count or wheelbase that disagrees with the configurationOnly with workarounds
Each figure depends on engine rating, transmission, creeper or model; checking a stated figure against it takes extra rules and formulas.		The stated figures are fields in the request and are compared with the computed ones.
Every problem returned in one answerOnly with workarounds
Rules tend to fire as the quote 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 model is not offered on the chosen version; the Cab version comes as F, S, V and GT, the Platform version as F, GE, GB and GT.
2The brochure lists the RoboShift transmission only for the Cab version and the T-Tronic transmission only for the Platform version.
3The Dynamic and Dynamic + trim levels include the RoboShift transmission, the reverse power shuttle and the electronically controlled rear hitch, and the quote lacks at least one of them.
4The Dynamic and Dynamic + trim levels are described only for the Cab version.
5The Dynamic + trim level includes rear electrohydraulic remotes, but the quote has mechanical rear remotes only.
6The suspended front axle is offered only for the F, S and GT models (F and GT on the Platform version).
7The front wet multidisc brakes are listed only together with the Hydra-Lock differential lock, and are not available on the V model.
8The rear tyre on the quote is not among the sizes the brochure lists for this model.
9The front weights on the quote are not listed for this model.
10The front quick coupling set on the quote is not listed for this version.
11The Auto PTO is available only in combination with the electronic rear hitch.
12The electrohydraulic multidisc rear PTO clutch is listed with the reverse power shuttle (RPS), which is not on the quote.
13The 3400 kg rear lift capacity with assistor rams is listed only for the GT models.
14The mechanical cab suspension with shock absorbers is an option only on the Cab version F and GT models.
15The electrohydraulic front hitch is not listed for the GB model.
16The front PTO is listed for the F, S, GT and GE models, not for the V or GB.
17The brochure lists a front ISOBUS socket only for the Platform version; the Cab version has the rear socket.
18The quote states a wheelbase of 2140 mm, but this configuration has 2190 mm.
19The quote states a maximum power of 112 hp, but this configuration has 90 hp.
20The quote states a maximum torque of 400 Nm, but this configuration has 410 Nm.
21The quote states 24 forward gears, but this transmission has 16.
22The quote states a hydraulic oil take-out capacity of 30 l, but this configuration has 25 l.

  

  

    
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. Platform options and dependencies: A Platform GB with a trim level, a front hitch and PTO options that depend on others

    
The agent's request. Please quote a Landini REX4 GB on the Platform version with the 4-090 engine rating, the Speed Four transmission and 380/70 R24 rear tyres, with the Dynamic trim, Auto PTO, the electrohydraulic PTO clutch and a front hitch. The quote states a maximum power of 90 hp, a maximum torque of 378 Nm, a wheelbase of 2140 mm, 12 forward gears and a hydraulic oil take-out of 25 l. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Trim level on the Platform version. The Dynamic and Dynamic + trim levels are described only for the Cab version.
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  • Rear tyre not listed for this model. The rear tyre on the quote is not among the sizes the brochure lists for this model.
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  • Auto PTO without the electronic rear hitch. The Auto PTO is available only in combination with the electronic rear hitch.
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  • Electrohydraulic PTO clutch without the power shuttle. The electrohydraulic multidisc rear PTO clutch is listed with the reverse power shuttle (RPS), which is not on the quote.
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  • Front hitch not offered on the GB. The electrohydraulic front hitch is not listed for the GB model.
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2. Platform options and dependencies: The agent resubmits after fixing the errors

    
The agent's request. Please quote a Landini REX4 GB on the Platform version with the 4-090 engine rating, the Speed Four transmission and 360/70 R20 rear tyres, with the reverse power shuttle, the electronic rear hitch, Auto PTO and the electrohydraulic PTO clutch. The quote states a maximum power of 90 hp, a maximum torque of 378 Nm, a wheelbase of 2140 mm, 12 forward gears and a hydraulic oil take-out of 30 l. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Tractor summary. 1 tractor(s), 90 hp maximum power, 378 Nm maximum torque, wheelbase 2140 mm, hydraulic oil take-out 30 l.
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3. Tyres, axle and wheelbase: A Cab V with a tyre, axle, front PTO and wheelbase the brochure does not give it

    
The agent's request. Please quote a Landini REX4 V on the Cab version with the 4-090 engine rating, the Speed Four transmission and 420/70 R28 rear tyres, with the suspended front axle and a front PTO. The quote states a maximum power of 90 hp, a maximum torque of 378 Nm, a wheelbase of 2140 mm, 12 forward gears and a hydraulic oil take-out of 25 l. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Suspended front axle not offered for this model. The suspended front axle is offered only for the F, S and GT models (F and GT on the Platform version).
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  • Rear tyre not listed for this model. The rear tyre on the quote is not among the sizes the brochure lists for this model.
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  • Front PTO not offered on the V and GB. The front PTO is listed for the F, S, GT and GE models, not for the V or GB.
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  • Stated wheelbase differs. The quote states a wheelbase of 2140 mm, but this configuration has 2190 mm.
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4. Tyres, axle and wheelbase: The agent resubmits after fixing the errors

    
The agent's request. Please quote a Landini REX4 V on the Cab version with the 4-090 engine rating, the Speed Four transmission and 360/70 R28 rear tyres. The quote states a maximum power of 90 hp, a maximum torque of 378 Nm, a wheelbase of 2190 mm, 12 forward gears and a hydraulic oil take-out of 25 l. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Tractor summary. 1 tractor(s), 90 hp maximum power, 378 Nm maximum torque, wheelbase 2190 mm, hydraulic oil take-out 25 l.
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5. Trim level and stated figures: A Cab GT Dynamic + with mechanical remotes, a wrong gear count and a market-dependent pack

    
The agent's request. Please quote a Landini REX4 F on the Cab version with the 4-120 engine rating, the RoboShift (HML) with creeper transmission and 380/70 R24 rear tyres, with the Dynamic + trim, the reverse power shuttle, the electronic rear hitch and the 3-year Fleet and Farm Pro Pack. The quote states a maximum power of 112 hp, a maximum torque of 420 Nm, a wheelbase of 2140 mm, 36 forward gears and a hydraulic oil take-out of 30 l. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Dynamic + with mechanical rear remotes. The Dynamic + trim level includes rear electrohydraulic remotes, but the quote has mechanical rear remotes only.
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  • Stated forward gears differ. The quote states 36 forward gears, but this transmission has 48.
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  • Fleet and Farm Pro Pack depends on the market. The brochure lists the Fleet & Remote Diagnostics Management and Landini Farm Pro Pack (1, 3 or 5 years) on selected markets only; a person should confirm it for the delivery market.
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6. Trim level and stated figures: The agent resubmits after fixing the errors

    
The agent's request. Please quote a Landini REX4 GT on the Cab version with the 4-120 engine rating, the RoboShift (HML) with creeper transmission and 420/70 R24 rear tyres, with the Dynamic + trim, the reverse power shuttle, the electronic rear hitch and 4 electrohydraulic rear remotes. The quote states a maximum power of 112 hp, a maximum torque of 420 Nm, a wheelbase of 2140 mm, 48 forward gears and a hydraulic oil take-out of 30 l. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Tractor summary. 1 tractor(s), 112 hp maximum power, 420 Nm maximum torque, wheelbase 2140 mm, hydraulic oil take-out 30 l.
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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 quote for a Landini REX4 specialty tractor: the version and model, engine power, transmission, and more. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the REX4 brochure Landini publishes 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 Landini REX4 GB on the Platform version with the 4-090 engine rating, the Speed Four transmission and 380/70 R24 rear tyres. The quote states a maximum power of 90 hp, a maximum torque of 378 Nm, a wheelbase of 2140 mm. The rest of the request is on screen.
    4. 
      
  4. Before it goes out, the agent calls the validator.
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  5. Blocked, with five findings, all in one answer. The Dynamic and Dynamic + trim levels are described only for the Cab version. The rear tyre on the quote is not among the sizes the brochure lists for this model. The Auto PTO is available only in combination with the electronic rear hitch. The other two are on screen.
    6. 
      
  6. The validator returned five 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 an option that depends on another (Auto PTO, PTO clutch, trim contents), 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 rear tyre to 360/70 R20, the rear hitch to electronic and the stated oil take-out as to 30 l. It sets the reverse power shuttle to yes. It removes the trim level and front hitch.
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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 five earlier findings are cleared.
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  13. Five 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.
    14.