The problem is whether the plan will work.
Such a plan will give rise to many problems.
It is difficult to carry out the plan.
This plan might work.
I don't think that plan has any problems, so I consent.
I don't think that plan has any problems, so I consent.
I'm afraid your plan will not work.
I'm afraid your plan won't work.
As far as I know, there is nothing wrong with his plan.
It is one thing to make a plan and quite another to carry it out.
計画はどんなことがあっても遂行すべきだ。
It is easy to form a plan, but it is difficult to carry it out.
The plan must be carried out by all means.
I'm dead against the plan.
What if the scheme doesn't work out?
I am afraid your plan will not work.
I'm afraid your plan won't work.