What Have We Learned from 100 Upgrades?

This presentation aims to give some basic knowledge about the process behind a successful upgrade project. There are basically 6 main topics to cover:

1) Estimation of an upgrade

- boundaries of an upgrade project

- How to evaluate the complexity of an upgrade project based on the code?

- How to estimate an upgrade: which points are a multiplier in the estimation?

2) 1. Step: Preparation

- how a checklist could look like

- necessary setup for a best practice upgrade project

3) 2. Step: Code Upgrade

- direct upgrade approach from 8.7 to 13.4

- refactoring

- automations

- how to use AI prompts

4) 3. Step: Backend Testing

- What to test in the backend?

5) 4. Step: Frontend upgrade

- which steps there are

6) 5. Step: Frontend testing

- testing -> how can you make an effective testing (backstop)

The whole presentation should highlight some example for each steps and give a basic idea what is the right approach to upgrade a website. I will show a couple of tools as well - some of them are custom made by us, some of them are publicly available.