experiment_version: "1.0"
experiment_id: "TPS-TC-001"
metadata:
name: "Push vs Pull Effectiveness"
description: |
Validate CONWIP superiority via Little's Law.
This is the foundational TPS test case demonstrating that
WIP-limited (Pull) systems outperform unrestricted (Push) systems.
author: "PAIML Engineering"
created: "2025-12-11"
tags: ["tps", "operations", "push-pull", "conwip", "wip-control"]
equation_model_card:
emc_ref: "operations/littles_law"
hypothesis:
null_hypothesis: |
H₀: There is no statistically significant difference in Throughput (TH)
or Cycle Time (CT) between Push and Pull systems when resource capacity
and average demand are identical.
alternative_hypothesis: |
H₁: Pull systems achieve lower cycle time with equivalent throughput.
expected_outcome: "reject"
reproducibility:
seed: 42
ieee_strict: true
simulation:
topology:
type: "tandem_line"
stations: 5
scenarios:
- name: "push"
wip_limit: null description: "MRP-style unlimited WIP release"
- name: "pull_conwip"
wip_limit: 10 description: "CONWIP with WIP cap of 10"
arrivals:
distribution: "poisson"
rate: 4.5
processing:
distribution: "lognormal"
mean: 1.0
cv: 1.5
duration:
warmup: 100 simulation: 1000 replications: 30
falsification:
import_from_emc: true
criteria:
- id: "TC1-CT"
name: "Cycle time reduction"
condition: "pull_ct < push_ct * 0.6"
severity: "major"
confidence: 0.95
- id: "TC1-TH"
name: "Throughput maintained"
condition: "|pull_th - push_th| / push_th < 0.05"
severity: "major"
- id: "TC1-VAR"
name: "Variance reduction"
condition: "std(pull_ct) < std(push_ct) * 0.5"
severity: "minor"
jidoka:
enabled: true
stop_on_severity: "critical"
statistics:
comparison_test: "welch_t_test"
alpha: 0.05
effect_size: "cohens_d"
reporting:
format: "markdown"
output: "reports/tps/tc1_push_vs_pull.md"
include:
- "hypothesis_test_results"
- "ct_distribution_comparison"
- "wip_time_series"