optimal amount optimal amounts optimal angle optimal application optimal approach optimal balance optimal battery optimal body optimal brain optimal capital optimal care optimal choice optimal cleaning optimal combination optimal comfort optimal communication optimal composition optimal concentration optimal condition optimal conditions optimal configuration optimal control optimal control problem optimal control problems optimal cost optimal currency optimal customer optimal data optimal decision optimal delivery optimal design optimal development optimal diet optimal distribution optimal dosage optimal dose optimal driving optimal duration optimal effect optimal effectiveness optimal efficiency optimal energy optimal environment optimal experience optimal fit optimal flexibility optimal flow optimal function optimal functionality optimal functioning optimal growth optimal handling optimal health optimal heat optimal image optimal implementation optimal integration optimal learning optimal length optimal level optimal levels optimal light optimal lighting optimal location optimal management optimal method optimal mix optimal number optimal nutrition optimal operating optimal operation optimal outcome optimal outcomes optimal parameters optimal path optimal patient optimal performance optimal ph optimal physical optimal placement optimal planning optimal policy optimal position optimal positioning optimal power optimal preparation optimal presentation optimal pressure optimal price optimal process optimal product optimal production optimal productivity optimal protection optimal quality optimal range optimal rate optimal ratio optimal reaction