Synthesis & Playbook
Consolidate the series into a practical local playbook: top levers, who controls them, what "good" looks like, and what to measure next so the work stays empirical and improves year over year.
How this fits in the series
Builds on: A1–A10
Leads to: none — this is the capstone session
Core concepts and execution implications
- Not all levers matter equally.
- Can produce a ranked list of highest-leverage actions.
- Ownership matters more than insight.
- Each action has a named owner/actor and next step.
- Measurement prevents drift.
- Can define a measurement plan for the next iteration.
Connections
- Affordability framework: Entire framework — CRO prioritization, all 22 CROs, 9 model dimensions
- Cross-series: P11 HVAC, IAQ & Mechanical Integration (parallel synthesis)
- Explore all 20 policy levers → | Explore all 22 CROs →
- Explore in Affordability Framework →
Top CROs by expected value
Ranked by mid-point estimated savings from the framework. Not additive.
- DENSITY: Increase effective residential density - $30K mid
- SIZE: Reduce minimum home size - $25K mid
- INFRA_BURDEN: Reduce off-site infrastructure obligations - $20K mid
- PREAPPROVAL: Pre-approve plans/details/archetypes - $15K mid
- METHODS: Adopt modular/prefabricated systems - $15K mid
- STANDARDS: Right-size street and parking standards - $15K mid
- FIN_PREDICTABILITY: Reduced interest, contingencies - $15K mid
- DURATION: Reduce project duration - $10K mid
- SHARED_INFRA: Share infrastructure across units/projects - $10K mid
- UTILITY_FEES: Differentiate utility tap fees by demand - $10K mid
Playbook outline by actor
Organized by "actor," because actors control levers.
-
Cities / counties:
DENSITY, DESIGN_PREDICTABILITY, PREAPPROVAL, PERMIT_FEES, STANDARDS -
Utilities:
UTILITY_FEES, SHARED_INFRA, DURATION (connection timing) -
Builders / developers:
SIZE, SIMPLIFY, STANDARDIZE, METHODS, EFFICIENCY, DURABILITY -
Lenders / capital:
UNDERWRITE, INSURANCE_CREDITS, MITIGATION, GREEN_MORTGAGE -
Community / stakeholders:
FIN_PREDICTABILITY (engagement practices), DENSITY (public acceptance)
Pick high-leverage moves
Before leaving the session, identify at least one CE/CRO pair you are willing to act on, name the authority, and define the first measurable step.
For each proposal, name the following to ensure it's actionable:
- CE moved: Which Cost Element(s) does this action reduce?
- CRO targeted: Which Cost Reduction Opportunity does it unlock?
- Barrier to clear: What specific barrier must be addressed?
- Responsible authority: Who has the power to act?
- Next step + measurement: What's the immediate action and how do we know it worked?
Common ways the playbook fails (and how to avoid them)
These are the predictable traps when turning insight into action.
-
No owner, no action
A good idea dies when nobody is responsible for moving it forward.
Avoid: assign a named owner and a next meeting date. -
Picking low-leverage moves
We spend effort on small buckets because they're easier to talk about.
Avoid: force every proposal to name the cost element it moves (yield, time, fees, risk, labor). -
"Reform" that's unusable
Pathways exist, but they're complex or risky, so adoption stays low.
Avoid: simplify, publish clear checklists, and reduce discretionary uncertainty. -
No measurement
Without measurement, we can't learn which changes helped.
Avoid: track a small set of outcome metrics consistently.
References & resources
- Affordability Framework Explorer
- Affordability series index
- Housing Cost Model
- A1: Framework overview — full CE and CRO tables