Timing sexual intercourse to avoid the time of ovulation (if pregnancy is not wanted) or to fall within that time (if pregnancy is desired).

(business) An interdisciplinary concept used to create and validate a practiced logistical plan for how an organisation will recover and restore interrupted critical functions within a predetermined time after a disaster or extended disruption.

plural of retirement annuity plan

plural of dividend reinvestment plan

plural of top-hat plan

(idiomatic) A proverbial expression used to signify the futility of making detailed plans when the ability to fully or even partially execute them is uncertain.

plural of open floor plan

Things don't always work out as they were planned.

No matter how a project is planned, accidents or misfortune can still happen with it.

Alternative form of the best laid plans of mice and men often go awry