I'm going to go against the grain here and push back against @EricRegnier and @cchannon's comments.
ALM is one of the most difficult parts and pain points of the platform when large team or parallel team development is involved.
Unless your team is very disciplined and avoids working on the same components, and syncs developer environments after every PR, be prepared to spend a lot of time dealing with solution merging conflicts. This is especially true when you have separate developer instances and are working with existing components. If you work in a single shared environment, you will spend a lot of time bringing over unfinished features to a build environment to clean them out manually and removing dependencies (unless you decide to try and follow a, feature flag development approach) . If you're touching the same components, expect forms, views, ribbon customizations, entity metadata, model driven apps, and other components to get overwritten by each others changes.
Another issue is the unpacked components are mostly XML, which isn't very git friendly and sometimes the git algorithm does not always automatically merge the way you expect, so manual intervention is involved.
Then there are some things that are either not solution aware, or require custom scripts to automate deployment, or can't be automated at all.
Personally I find ALM in the Power Platform much more difficult than custom development because of all these complexities and many areas being a black box, and a lack of auditing when it comes to customizations being made, so you can't tell who made what changes in a shared environment.
Things I can suggest are:
- creating small topic/feature solutions that only contain compoments you are changing. Then transport them to a master dev environment to merge and remove unnecessary components/dependencies where applicable.
- Sync all development environments often to reduce the risk of stale components overwriting newer changes and causing regressions.
- Avoid working on the same components at the same time, especially forms and views.
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