I'm not aware of any relevant reference, but I like the Jep one. It leaves us the most flexibility. A minute early is a lot better than a minute late. The minute early we can soak up easy, the minute late is a minute lost to the sequence. On time is brillliant, but still might not work...
The TMA & the flow machine are working in seconds, but enroute are working in minutes, and those minutes will be clicking back and forward (in a loose sequence) until you call the TMA. You may be busting a gut to meet a time that is actually 1.4 min later than we (all of a sudden) need you there.
Add in variables like you a minute early and the heavy in front 2 minutes late (bluddy A340s) and thats when the sequence is changed. Jolly good fun and boosts the canteen's coffee sales
Please don't use this as an excuse to drive through early to snipe somebody elses slot but, some misguided, twisted souls think these silly times are a means of achieving separation also.