negligible - So small or unimportant that it can be ignored or doesn't have a noticeable effect; insignificant in amount, size, or impact — too minor to be worth considering.
The difference in price was negligible, so she bought the higher-quality clothing.
regimented - Referring to something that is arranged in a highly structured or ordered manner, often with little room for flexibility or deviation.
He was determined to lose weight, and he realized that he could accomplish this only with a regimented approach to exercize and diet.