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