---
id: po.wb.dca.decline-model-fitters
title: Decline Model Comparison — Arps, Duong, PLE
category: DCA
tags:
  - decline-curve
  - arps
  - duong
  - ple
  - model-comparison
  - eur
---

# Decline Model Comparison — Arps, Duong, PLE

## Purpose

Side-by-side comparison of three decline models with EUR analysis. Named inputs for all
model parameters. 21 time steps out to 360 months with model spread analysis.

## Plan

- [x] Inputs sheet with named cells for all three models
- [x] EUR comparison on Inputs sheet
- [x] 21-step rate forecast with spread % column
- [x] Multi-series rate comparison chart
- [ ] Add cumulative comparison section
- [ ] Add per-model fitting workflow