Ah, I see. Perhaps you can use Analysis & Design tasks not to estimate the actual work, but further research tasks necessary to get to a more solid answer. Setting the expectation that all issues can be analyze and designed in 6 hours seems arbitrary.
Many times the Analysis and Design of a solution encompasses trying things out and actually experimenting with changes. By the time you're done with Analysis and Design you've virtually implemented the solution. Of course there is the documentation and reviews that you could also estimate separately.
This is a classic human problem - we suck at estimation. And if some pointy haired boss is demanding perfect estimates, you should give him or her good estimates for the next piece of work you can predict rather than the finished task.
Many times the Analysis and Design of a solution encompasses trying things out and actually experimenting with changes. By the time you're done with Analysis and Design you've virtually implemented the solution. Of course there is the documentation and reviews that you could also estimate separately.
This is a classic human problem - we suck at estimation. And if some pointy haired boss is demanding perfect estimates, you should give him or her good estimates for the next piece of work you can predict rather than the finished task.