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name: Trend Modeling description: This skill should be used when the user asks to "model trends with limited data", "three-valued logic analysis", "scenario generation", "transitional graphs", "qualitative trend analysis", "uncertain data analysis", "minimal-information modeling", or needs guidance on trend-based modeling using INC/DEC/CONST logic, scenario planning with limited quantitative data, or generating transitional scenario graphs. version: 0.1.0

Trend Modeling with Three-Valued Logic

Overview

Based on research in trend-based optimization for product innovation, this skill applies three-valued logic (increasing/decreasing/constant) to analyze markets when precise numerical data is unavailable. This approach enables meaningful analysis with minimal information.

Core Concept

Traditional market analysis requires extensive quantitative data. Three-valued logic provides an alternative when:

• Data is scarce or unreliable
• Relationships are qualitative
• Uncertainty is high
• Quick directional insights are needed

The Three Values

INC (Increasing)

• Variable is trending upward
• Rate of increase may be accelerating (AG) or decelerating (DG)
• Symbol: ↑ or (+)

DEC (Decreasing)

• Variable is trending downward
• Rate of decrease may be accelerating (AD) or decelerating (DD)
• Symbol: ↓ or (-)

CONST (Constant)

• Variable is stable or unchanged
• OR insufficient data to determine direction
• Symbol: → or (=)

Extended Notation

For more nuanced analysis:

Code	Meaning	Description
AG	Accelerating Growth	INC with increasing rate
DG	Decelerating Growth	INC with decreasing rate
AD	Accelerating Decrease	DEC with increasing rate
DD	Decelerating Decrease	DEC with decreasing rate

Correlation-to-Trend Conversion

Transform correlation relationships into trend relationships:

If variables X and Y have positive correlation:

• When X is INC → Y is INC
• When X is DEC → Y is DEC
• Notation: INC(X, Y)

If variables X and Y have negative correlation:

• When X is INC → Y is DEC
• When X is DEC → Y is INC
• Notation: DEC(X, Y)

Example:

• Market size and competition have positive correlation
• If Market Size = INC, then Competition = INC
• If Market Size = DEC, then Competition = DEC

Trend Model Construction

Step 1: Identify Variables

List market variables of interest:

• Market size
• Competition intensity
• Price pressure
• Innovation rate
• Customer adoption
• Regulatory burden

Step 2: Determine Relationships

For each pair of variables:

• Identify correlation direction (positive/negative)
• Convert to trend relationship (INC/DEC)

Step 3: Build Trend Matrix

Variable	Market Size	Competition	Price	Innovation
Market Size	-	INC	DEC	INC
Competition	INC	-	DEC	CONST
Price	DEC	DEC	-	DEC
Innovation	INC	CONST	DEC	-

Step 4: Generate Scenarios

A scenario is a consistent assignment of INC/DEC/CONST to all variables that satisfies all relationships.

Step 5: Identify Terminal Scenarios

Terminal scenarios are equilibrium states where:

• All relationships are satisfied
• System is stable
• No further transitions occur

Transitional Scenario Graphs

Create Mermaid diagrams showing scenario evolution:

stateDiagram-v2
    [*] --> S1: Initial conditions

    S1: Scenario 1<br/>Market=INC, Comp=INC<br/>Price=DEC, Innov=INC

    S2: Scenario 2<br/>Market=CONST, Comp=INC<br/>Price=DEC, Innov=CONST

    S3: Scenario 3 (Terminal)<br/>Market=DEC, Comp=CONST<br/>Price=CONST, Innov=DEC

    S4: Scenario 4 (Terminal)<br/>Market=INC, Comp=INC<br/>Price=DEC, Innov=INC

    S1 --> S2: Market saturation
    S1 --> S4: Sustained growth
    S2 --> S3: Commoditization
    S2 --> S4: Innovation breakthrough

Multi-Objective Trade-offs

From the research: "No scenario satisfies all objective functions simultaneously."

When analyzing terminal scenarios:

1. Identify competing objectives
2. Map which scenarios favor which objectives
3. Highlight trade-offs required
4. Recommend based on priority alignment

Application to Market Analysis

Use Case: New Market Entry

Variables:

• Market Growth (MG)
• Competitive Intensity (CI)
• Entry Barriers (EB)
• Customer Awareness (CA)

Relationships:

• INC(MG, CI) - Growing markets attract competitors
• INC(MG, CA) - Growth increases awareness
• DEC(EB, CI) - Lower barriers increase competition
• INC(CA, MG) - Awareness drives growth

Scenarios Generated:

1. Explosive growth: MG=AG, CI=AG, EB=DEC, CA=AG
2. Mature equilibrium: MG=DG, CI=CONST, EB=CONST, CA=CONST
3. Consolidation: MG=DEC, CI=DEC, EB=INC, CA=CONST

Output Structure

## Trend Model Summary

### Variables
| Variable | Current State | Trend | Confidence |
|----------|---------------|-------|------------|
| [Name] | [Description] | INC/DEC/CONST | High/Med/Low |

### Relationship Matrix
[Matrix showing INC/DEC relationships]

### Generated Scenarios
| Scenario | Var1 | Var2 | Var3 | Terminal? |
|----------|------|------|------|-----------|
| S1 | INC | DEC | CONST | No |
| S2 | CONST | CONST | DEC | Yes |

### Transitional Graph
[Mermaid state diagram]

### Terminal Scenario Analysis
**Scenario X**: [Description]
- Conditions: [What leads here]
- Trade-offs: [What must be sacrificed]
- Recommendation: [Strategic implication]

### Key Insights
1. [Insight about scenario transitions]
2. [Insight about trade-offs]

Best Practices

• Start simple: Begin with 4-6 variables
• Validate relationships: Check with domain experts
• Document uncertainty: Note where relationships are speculative
• Update iteratively: Refine model as new information emerges
• Focus on transitions: The paths between scenarios often matter more than endpoints

Advantages of This Approach

From the research:

• "No numerical values of constants or parameters are needed"
• "A complete list of all futures/histories is obtained"
• "Results remain easy to understand without knowledge of sophisticated mathematical tools"

Additional Resources

For theoretical background and advanced techniques, see:

• references/three-valued-logic.md - Theoretical foundation
• references/scenario-generation.md - Algorithm details
• examples/trend-model-example.md - Worked example