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← All toolsTOOL-015 · Gate 5 Fundamental Tool

Site Drainage Layout / Scenario Comparator

Compare drainage alternatives using explicit user-supplied engineering metrics and transparent weights. No new hydraulic solver is introduced.

V1 compares supplied scenario metrics only. Inadequate-capacity scenarios remain in the weighted ranking and are explicitly labeled.
01

Scenario metrics

Two-scenario comparison in V1 UI.

Comparison
Scenario A
Scenario B
Explicit weights · sum must equal 1.0
02

Comparison result

Enter metrics and compare.

Δ

Ready for comparison

Weights and all metrics remain explicit.

Methodology

Transparent scenario comparison

TOOL-015 does not introduce another drainage hydraulic engine. It compares metrics already supplied by the user or produced by upstream frozen tools.

Metrics

Higher capacity margin ratio is better. Lower total pipe length, excavation length, maximum diameter and outfall count are better.

Normalization

Each metric is min-max normalized across the scenarios currently being compared. If every scenario has the same value for a metric, each receives score 1 for that metric.

Weights

Weights are explicit user inputs and must sum to 1.0. The ranking therefore represents the stated priorities, not an engineering approval. Equal weighted scores within 1e-12 share the same rank. Hydraulically inadequate scenarios remain visible in the ranking and are never silently filtered.

Worked example

With weights 0.40/0.20/0.15/0.15/0.10, Scenario A score is 0.4500 and Scenario B score is 0.5500.

Limitations

SI/US inputs are normalized to canonical SI before comparison. No GIS routing, SWMM, automatic layout generation, cost database, constructability solver, permitting logic or new hydraulic formula is included.

Source

SRC-SCENARIO-COMPARATOR-TOOL015-001