"stringent plan" is an appropriate and valid phrase to use in written English.
You can use it in situations where you want to describe a plan that is very strict or demanding. For example, "The company implemented a stringent plan to improve safety in the workplace."
A federal judge has ordered Connecticut's beleaguered child welfare agency to comply with a stringent plan to improve within three years to end its court oversight.
Apparently in response, Hakuo Yanagisawa, the head of the Financial Services Agency, announced a stringent plan to clean up Japan's debt-laden banks and corporations.
In April, the company revealed that Sorrell would accept measures including a £150,000 pay cut, a more than 20% cut to his maximum potential bonus and the replacement of the highly-controversial 'leadership equity acquisition plan' (LEAP) long-term incentive scheme with a more stringent plan.
"Once again, it brings into sharp focus the ongoing threat our trees and woods are facing and highlights the need for a stringent plan of action to protect them," said Austin Brady, head of conservation at the Woodland Trust.
While you're creating a stringent plan to reach your weight loss goals, the secondary reason for this plan is to keep you motivated.
Others choose one day a week where they eat whatever they want and the other six days they follow a stringent plan and ultimately this keeps them on track longer.
She comes to the conclusion that Dobson's stringent plans were used in surprisingly flexible ways.
Her career is something she takes very seriously, and she has stringent plans: "I love Natalie Portman.
"We can't eliminate all risks but we have stringent plans to deal with threats, and take prompt action should they be detected.
But it is unclear if more stringent plans to close mines that produce fewer than 300,000 tons will go forward in light of the shortages.
He has already stacked the case in favour of fracking, relative to wind power, thanks to less stringent planning rules and by placing the initial decisions not in the hands of local councils but more distant county councils.
