Defining your Sev-1s
One of the primary things you need to figure out whenever your team is formulating your incident management process is describing in words what a Sev0(your highest incident priority) looks like. “Website doesn’t work” is certainly no enough. “Website is up but a key resource (ie CSS file) is missing, rendering the website unusable” is still not enough. “A single page on the website is 404’ing” is not a major but could be a minor incident.