As you said, chat logs, logging source of truth, and any context that can be provided by subject matter experts on the system(s) in question. Google's SRE reso

As you said, chat logs, logging source of truth, and any context that can be provided by subject matter experts on the system(s) in question. Google's SRE resources on this topic are somewhat helpful, consider reviewing and evaluating for your environment. https://sre.google/workbook/postmortem-culture/ https://sre.google/workbook/postmortem-culture/ https://sre.google/sre-book/postmortem-culture/ https://sre.google/sre-book/postmortem-culture/