Here are some flowcharts to help integrators integrate apps into the system and build assemblies:
https://apiant.com/docs/flowcharts/App-Integration-Flowchart.html
https://apiant.com/docs/flowcharts/OAuth-App-Assembly-Flowchart.html
https://apiant.com/docs/flowcharts/User-Input-App-Assembly-Flowchart.html
https://apiant.com/docs/flowcharts/Trigger-Assembly-Flowchart.html (updated July 18, 2018)
https://apiant.com/docs/flowcharts/Protocol-Integration-Flowchart.html (added July 19, 2018)
https://apiant.com/docs/flowcharts/Webhook-Trigger-Assembly-Flowchart.html
https://apiant.com/docs/flowcharts/Polling-Trigger-Assembly-Flowchart.html
https://apiant.com/docs/flowcharts/Action-Assembly-Flowchart.html
https://apiant.com/docs/flowcharts/Assembly-Review-Flowchart.html