▁perce ived ▁as ▁being ▁ur gent ▁and ▁important , ▁ ▁B ▁– ▁Task s ▁that ▁are ▁important ▁but ▁not ▁ur gent , ▁ ▁C ▁– ▁Task s ▁that ▁are ▁un important ▁but ▁ur gent , ▁ ▁D ▁– ▁Task s ▁that ▁are ▁un important ▁and ▁not ▁ur gent . ▁Each ▁group ▁is ▁then ▁rank - ordered ▁by ▁priority . ▁To ▁further ▁ref ine ▁the ▁prior it ization , ▁some ▁individuals ▁choose ▁to ▁then ▁force - rank ▁all ▁" B " ▁items ▁as ▁either ▁" A " ▁or ▁" C ". ▁ABC ▁analysis ▁can ▁incorpor ate ▁more ▁than ▁three ▁groups . ▁ ▁ABC ▁analysis ▁is ▁frequently ▁combined ▁with ▁P are to ▁analysis . ▁ ▁P are to ▁analysis ▁ ▁See ▁also : ▁P are to ▁analysis ▁ ▁This ▁is ▁the ▁idea ▁that ▁ 8 0 % ▁of ▁tasks ▁can ▁be ▁completed ▁in ▁ 2 0 % ▁of ▁the ▁dispos able ▁time , ▁and ▁the ▁remaining ▁ 2 0 % ▁of ▁tasks ▁will ▁take ▁up ▁ 8 0 % ▁of ▁the ▁time . ▁This ▁principle ▁is ▁used ▁to ▁sort ▁tasks ▁into ▁two ▁parts . ▁According ▁to ▁this ▁form ▁of ▁P are to ▁analysis ▁it ▁is ▁recommended ▁that ▁tasks ▁that ▁fall ▁into ▁the ▁first ▁category ▁be ▁assigned ▁a ▁higher ▁priority . ▁ ▁The ▁ 8 0 - 2 0 - rule ▁can ▁also ▁be ▁applied ▁to ▁increase ▁product ivity : ▁it ▁is ▁assumed ▁that ▁ 8 0 % ▁of ▁the ▁product ivity ▁can ▁be ▁achieved ▁by ▁doing ▁ 2 0 % ▁of ▁the ▁tasks . ▁Similarly