Coming up with a new plan should not take long.

After a week, they came up with a new plan.

Now they've got to come up with a plan within 18 months.

I might be able to come up with a plan.

He gave the company 60 days to come up with a new plan.

I had to come up with a far better plan.

So the men, who knew each other from church, came up with a plan.

Perhaps after a few hours his mind would come up with a new plan.

Or he'd have to come up with a better plan.

He had maybe three minutes to come up with a plan.