rough
crude
sketchy
unintended
unstudied
uncontrived
unsystematically
nonanalytical
unanalytical
unmethodical
nonmethodical
nonrigorous
unrigorous
unrefined
unprocessed
unthorough
through an experiment
unempirically
by experimentation
experimentally
blindly
nonmethodological
unmethodological
well-made
greige
unsystematical
shortsighted
nondeliberate
undesigned
unmeticulous
improvident
ill-considered
ill-judged
off the top of one's head
undeliberate
unpurposed
advertently
extempore
extemporary
extemporaneous
impromptu
unexacting
offhanded
ad-lib
off-the-cuff
well-laid
heedfully
mindfully
unrehearsed
slight