The phrase "a rigid scheme of" is correct and usable in written English.
It can be used to describe a strict or inflexible framework or plan in various contexts, such as education, organization, or methodology.
Example: "The project was hindered by a rigid scheme of regulations that left no room for creativity."
Alternatives: "a strict framework of" or "an inflexible structure of".
This should by no means be taken as a rigid scheme, however.
But Scottish Conservative transport spokesman Alex Johnstone questioned why it had taken Mr Brown "so long to peg the cost of off-peak rail fares and why he is determined to run such a rigid scheme".
Treatment for metastatic melanoma currently undergoes a transformation, changing the rigid scheme of dacarbazine as standard treatment in all stage-IV melanoma patients, attributed with a very low response rate and an extremely poor survival, into new, individualized therapeutic strategies.
Instead of a rigid utopian scheme or soulless sprawl, the serenity of open space would be combined with the vitality of urban density.
This admittedly rigid scheme leads Tyler through an eclectic menagerie of Western thinkers, not all of them philosophers, and through the aforementioned 101 ferae.
Loop 6 pivots around the N-terminal (PVW) and C-terminal (KTA) hinges during loop closure, while the "tip" residues (AIGTG) move as a rigid body (Scheme 2).
"The Future of Sharia" amounts to a kind of secularism: it proposes not a rigid separation of politics and religion, as in Turkey, but, rather, a scheme in which Islam informs political life but cannot be introduced into law by an appeal to any religious authority.
The fast track scheme – along with the direct entry programme which appoints non-police senior leaders to superintendent rank – is part of a wider movement to bring more diversity and a fresh perspective to policing, a profession dogged by accusations of opaqueness and a rigid following of convention.
