0% - completely swamped and expect to be here until at least 3 am for next several days.
25% - pretty swamped and getting home after midnight for next several days.
50% - staying fairly busy but still getting home between 10pm and midnight.
75% - going home before 10pm.
If you're not familiar with the hours in investment banking, here's another e-mail message I found that might provide a little more light on the subject of capactiy to an investment banking analyst. The below e-mail defining capacity was circulated by an unnamed widget manufacturing and marketing company to all of its employees:
0% - completely swamped and expect to work just about every minute of my eight-hour day, as well as through all of my one-hour lunch break, and might even have to stay a few minutes past 6 p.m.
25% - pretty swamped and only able to check my personal e-mail five times a day and surf the Internet for about an hour but still out of here at 6
50% - staying fairly busy but taking an extra half hour at lunch and tracking e-bay bids all day and e-mailing friends every half hour before counting down the seconds to 6
75% - probably clocking in an hour or two of work, at most, and leaving whenever, always making it on the dot for the start of happy hour!
An internal Bank of America e-mail asking some BofA analysts to estimate their current workload capacities recently made its rounds on the Web. The e-mail included the below "definition" of capacity, and analysts were told they could also "use percentages in between":