Dependency Mapping Skill

Systematic identification and management of cross-project dependencies.

Purpose

This skill provides a framework for:

• Dependency identification
• Dependency classification
• Impact analysis
• Critical path identification
• Dependency tracking and management

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Prerequisites

Before dependency mapping, ensure:

Prerequisite	Required For	Source
Project schedules	Timeline analysis	Project managers
Project deliverables	Dependency identification	Project plans
External contracts	Vendor dependencies	Procurement
Integration points	Technical dependencies	Architecture

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Dependency Types

Internal Dependencies

Type	Definition	Example
Finish-to-Start (FS)	B starts when A finishes	Development → Testing
Start-to-Start (SS)	B starts when A starts	Parallel workstreams
Finish-to-Finish (FF)	B finishes when A finishes	Code freeze → Doc freeze
Start-to-Finish (SF)	B finishes when A starts	Rare, shift handoff

External Dependencies

Type	Definition	Risk Level
Vendor	Third-party delivery	Medium-High
Regulatory	Approval or certification	High
Infrastructure	Environment availability	Medium
Integration	API or system availability	Medium-High
Resource	Shared resource availability	Medium

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Dependency Mapping Gates

Gate 1: Dependency Identification

Objective: Identify all dependencies across portfolio

Actions:

1. Review project schedules for cross-project links
2. Interview project managers
3. Document deliverable handoffs
4. Identify external dependencies

Identification Questions:

• What does this project need from other projects?
• What does this project provide to other projects?
• What external inputs are needed?
• What must be complete before this can start?

Output: docs/pmo/{date}/dependency-inventory.md

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Gate 2: Dependency Classification

Objective: Classify dependencies by type and criticality

Actions:

1. Classify by dependency type (FS, SS, FF, SF)
2. Classify by source (internal/external)
3. Assess criticality (critical path/slack)
4. Document constraints and assumptions

Criticality Assessment:

Level	Criteria	Management
Critical	On critical path, no slack	Daily monitoring
High	< 1 week slack	Weekly monitoring
Medium	1-4 weeks slack	Bi-weekly monitoring
Low	> 4 weeks slack	Monthly monitoring

Output: docs/pmo/{date}/dependency-classification.md

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Gate 3: Impact Analysis

Objective: Understand impact of dependency failure

Actions:

1. Analyze schedule impact
2. Analyze cost impact
3. Identify cascade effects
4. Document mitigation options

Impact Assessment Template:

Dependency	If Delayed By	Schedule Impact	Cost Impact	Cascade To
[Dep]	1 week	[Impact]	[Impact]	[Projects]
[Dep]	2 weeks	[Impact]	[Impact]	[Projects]
[Dep]	1 month	[Impact]	[Impact]	[Projects]

Output: docs/pmo/{date}/dependency-impact.md

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Gate 4: Critical Path Analysis

Objective: Identify and protect the critical path

Actions:

1. Map critical path across projects
2. Identify dependencies on critical path
3. Analyze buffer/slack
4. Recommend protection measures

Critical Path Visualization:

Project A: [Task A1] → [Task A2] → [Deliverable A]
                                          ↓
Project B:                        [Task B1] → [Task B2] → [Deliverable B]
                                                                  ↓
Project C:                                               [Task C1] → [Task C2] → [Final]

Protection Measures:

• Buffer allocation
• Parallel path development
• Early warning triggers
• Contingency plans

Output: docs/pmo/{date}/critical-path-analysis.md

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Gate 5: Dependency Tracking Plan

Objective: Create ongoing tracking and management plan

Actions:

1. Define tracking frequency per criticality
2. Assign dependency owners
3. Create communication plan
4. Define escalation triggers

Tracking Template:

Dependency	Owner	Update Freq	Status	Next Milestone	Risk
[Dep]	[Owner]	[Freq]	[Status]	[Date: Milestone]	[Risk]

Escalation Triggers:

• Critical dependency at risk
• External dependency delayed
• Cascade impact identified
• Owner not responding

Output: docs/pmo/{date}/dependency-tracking-plan.md

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Anti-Rationalization Table

See shared-patterns/anti-rationalization.md for universal anti-rationalizations.

Dependency-Specific Anti-Rationalizations

Rationalization	Why It's WRONG	Required Action
"We've documented the main dependencies"	Undocumented dependencies cause surprise delays.	Document ALL dependencies
"That's a soft dependency, not critical"	Soft dependencies become hard when they fail.	Classify and track all
"External vendor always delivers"	Past performance ≠ future guarantee.	Track and verify externals
"Projects will coordinate directly"	Ad-hoc coordination fails under pressure.	Formal tracking required

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Pressure Resistance

See shared-patterns/pressure-resistance.md for universal pressure scenarios.

Dependency-Specific Pressures

Pressure Type	Request	Agent Response
"We trust the other team, don't track"	"Trust doesn't prevent delays. Tracking enables early action."
"Too many dependencies to track"	"Complexity requires MORE tracking, not less. Will prioritize by criticality."
"Vendor said it's on track"	"Vendor assurance needs verification. Confirming with evidence."

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Blocker Criteria - STOP and Report

ALWAYS pause and report blocker for:

Situation	Required Action
Critical dependency at risk	STOP. Immediate escalation. Cascade impact pending.
Circular dependency identified	STOP. Architectural issue requires resolution.
External dependency failed	STOP. Contingency activation required.
Dependency owner unresponsive	STOP. Escalate for owner assignment.

Cannot Be Overridden

The following requirements are NON-NEGOTIABLE:

Requirement	Cannot Override Because
Complete dependency inventory	Hidden dependencies cause surprise delays
Owner assignment	Unowned dependencies are unmanaged
External verification	Vendor assurance without evidence is unreliable
Critical path protection	Critical path delays affect entire portfolio
Cascade impact documentation	Unknown cascades become crisis

If user insists on violating these:

1. Escalate to orchestrator
2. Do NOT proceed with incomplete mapping
3. Document the request and your refusal

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Severity Calibration

When assessing dependency risks:

Severity	Criteria	Examples
CRITICAL	On critical path, no slack, high impact	Core API dependency blocking 3+ projects, vendor at risk of bankruptcy
HIGH	< 1 week slack, significant impact	Integration dependency with tight timeline, key resource dependency
MEDIUM	1-4 weeks slack, moderate impact	Supporting service dependency, documentation dependency
LOW	> 4 weeks slack, minor impact	Nice-to-have integration, optional feature dependency

Track all severities. Actively manage CRITICAL and HIGH.

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Output Format

Dependency Map Summary

# Cross-Project Dependency Map - [Date]

## Dependency Overview

| Metric | Value |
|--------|-------|
| Total Dependencies | N |
| Internal | N |
| External | N |
| On Critical Path | N |
| At Risk | N |

## Dependency Matrix

| From Project | To Project | Dependency | Type | Criticality | Status |
|--------------|------------|------------|------|-------------|--------|
| [Project] | [Project] | [Description] | [FS/SS/FF/SF] | [Crit/High/Med/Low] | [On Track/At Risk/Blocked] |

## Critical Path Dependencies

[Visual representation of critical path]

## External Dependencies

| Vendor/Source | Dependency | Due Date | Status | Contingency |
|---------------|------------|----------|--------|-------------|
| [Vendor] | [Dependency] | [Date] | [Status] | [Plan] |

## At-Risk Dependencies

| Dependency | Risk | Impact | Mitigation |
|------------|------|--------|------------|
| [Dep] | [Risk description] | [Impact] | [Mitigation] |

## Recommendations

1. [Recommendation with rationale]
2. [Recommendation with rationale]

## Decisions Required

1. [Decision needed with options]

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Execution Report

Base metrics per shared-patterns/execution-report.md:

Metric	Value
Analysis Date	YYYY-MM-DD
Scope	[Portfolio/Projects]
Duration	Xh Ym
Result	COMPLETE/PARTIAL/BLOCKED

Dependency-Specific Details

Metric	Value
dependencies_total	N
critical_path_deps	N
external_deps	N
at_risk_deps	N

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When Dependency Mapping Is Not Needed

Condition	Verification
Single isolated project	Verify no cross-project dependencies
No external dependencies	Confirm all resources internal
No shared resources	Verify team is dedicated
Previous mapping is current (<30 days)	Reference existing map

MUST: Full dependency mapping REQUIRED for the following conditions:

Condition	Why Required
Multiple projects share resources	Resource conflicts cause delays
External vendor dependencies exist	Vendor delays cascade to projects
Integration points between projects	Technical dependencies create coupling
New project added to portfolio	Impact on existing dependencies unknown
Critical milestone approaching	Risk assessment needs current dependencies

MUST: When in doubt, update the dependency map. Stale dependency information causes crisis.