2022.04Manufacturing & EnergyLegacy Modernization

Core Accounting System Modernization

Moved a 20-year-old terminal screen to the web while keeping its information density intact.

WebServer & Infra

Core Accounting System Modernization — Screen reconstructed from delivered work. Contains no client data.

Timeline: About 6 months
Team size: 4 people
Platforms: Web · Server
Migration scope: Screens only, moved to the web

Background

The client had used a terminal-screen accounting system for over 20 years. The screens were dated, but staff were deeply accustomed to the information layout and input order within them — moving to something different would have slowed the work down rather than speeding it up.

Scope

Analysis of existing screen information density
Reimplementation of accounting input screens on the web
Kept integration with the existing Oracle database
Ported the keyboard-shortcut-based input flow
Screen access control by permission level

Technical decisions

What we chose, and why it fit

Kept the existing Oracle database rather than replacing it

With decades of accounting data accumulated, also changing the database would have made migration risk far greater than the risk of switching screens. We moved only the screens to the web and kept the database connection, narrowing the verification scope to the screens.

Stack

.NETReactOracle