A rigorous set of core courses should achieve that, they said.

"You need a rigorous set of procedures about how often to back up," he said.

Before patients are deemed to be a suitable candidate for this treatment, they have to go through a rigorous set of tests.

Combined with other code coverage methods, the aim is to develop a rigorous, yet manageable, set of regression tests.

It's a rigorous set of standards, enforced by experienced editors.

Under the plan, the administration would give more aid to a smaller number of countries that can pass a rigorous set of "performance" criteria.

Contestants went through two rigorous sets of cuts.

Applicants have to pass a rigorous set of criteria as well as entrance exams to qualify.

The government has promised a very rigorous set of regulations regarding all experiments in cloning.

One will impose a rigorous set of standards on oneself in order to attempt to actually measure up to what the idealized image is.