Actually, looking back through my collection, Uncertain Tasks were not introduced in DGP's Traveller's Digest magazine issue 1 after all. If you look at the first four issues of the Traveller's Digest the task system is introduced gradually:
- Issue 1: The article 'Using Skills Effectively' introduces the concept of Simple, Routine, Difficult and Formidable Tasks as well as the 3, 7, 11, 15 roll mechanic.
- Issue 2: The article 'Easy Task Definition' introduces the concepts of Task Duration and Repeatability, as well as the compound stat Determination.
- Issue 3: The article 'Damage and Repair' introduces the concept of Damage levels, adapted from Striker to fit the task system.
- Issue 4: The article 'Accidents and Mishaps' introduces the concept of Mishaps to the Task system. Incidentally, the task system was presented as a two-page cheat sheet from this issue forward.
Uncertain tasks were actually introduced in DGP's
Grand Survey (1986), forerunner to the later Worldbuilder's Handbook. They are included on the task system Cheat Sheet on page 2 and described as part of the sensor panel rules on page 13. They first appear in Traveller's Digest in issue 6 in the article '
The Referee's Guide to Using Tasks', which mentions their introduction in Grand Survey. I was not aware - always good to check the sources.
J