Example : A haphazard plan of action.
His judgment is rather hit-or-miss.

Synonyms : hit-or-miss

Example : A most haphazard system of record keeping.
Slapdash work.
Slipshod spelling.
Sloppy workmanship.

Synonyms : slapdash, slipshod, sloppy

Example : The Prime Minister was wearing a grey suit and a white shirt with a soft collar, but his neck had become thinner and the collar stood away from it as if it had been bought haphazard.

Synonyms : haphazardly