Make a database with a separate record for each Date and Time bucket, and each record has a field for each tech's activity.
Fields: Date, TimeBucket,Tech1, Tech2, Tech3,....Techn
Display in a subform showing table mode
Rough example, ignoring AM/PM:
Quote:DATE........TIME..................TECH1..............TECH2..............TECH3
7/15/05.....08:00-08:30.....Tech1Activity.....Empty................Empty
7/15/05.....08:30-09:00.....Tech1Activity.....Tech2Activity.....Tech3Activity
7/15/05.....09:00-09:30.....Tech1Activity.....Tech2Activity.....Tech3Activity
7/15/05.....09:30-10:00.....Empty..............Empty...............Tech3Activity
...
...
...
9/11/05.....02:30-03:00.....Tech1Activity.....Tech2Activity.....Tech3Activity
9/11/05.....03:00-03:30.....Tech1Activity.....Tech2Activity.....Tech3Activity
9/11/05.....03:30-04:00.....Empty..............Empty...............Tech3Activity
Date and TimeBuckets are Read Only. You can edit each Tech's activity real time. The Tech Activity above an be anything, Customer Name ID, for example. That info could then be used to call up the Customer's record with history, etc.
You could also create a process to add new records automatically for future date/timebuckets as needed.