I read in the rules that
The caster can work for up to 8 hours each day. He cannot rush the process by working longer each day, but the days need not be consecutive, and the caster can use the rest of his time as he sees fit. If the caster is out adventuring, he can devote 4 hours each day to item creation, although he nets only 2 hours' worth of work. This time is not spent in one continuous period, but rather during lunch, morning preparation, and during watches at night. If time is dedicated to creation, it must be spent in uninterrupted 4-hour blocks. This work is generally done in a controlled environment, where distractions are at a minimum, such as a laboratory or shrine. Work that is performed in a distracting or dangerous environment nets only half the amount of progress (just as with the adventuring caster). hour blocks.
Now the question is: If I am out adventuring (i.e. having stuff like fights going on at that day, but not more than say 1-3 hours) and I have an adequate, quite place (say a room in a tavern or a workshop) for at least four uninterrupted hours. Can I craft at the normal rate or do I need to work at the slower adventuring rate?