The phrase "alternate arrangements" is correct and usable in written English.
You can use it when referring to different options or plans that can be made instead of the original ones.
Example: "Due to the unexpected weather conditions, we will need to make alternate arrangements for the event."
Alternatives: "alternative plans" or "substitute arrangements".
There could be alternate arrangements where there are conflicts.
Many, like Miss Mitchell, had to make alternate arrangements.
As of Monday they had not been able to make alternate arrangements.
The alternate arrangements are wonderfully diverse and include one played on the sitar and another done boogie-woogie style.
About two hours after the grid failure, power ministry authorities said some alternate arrangements had been made.
The exchange interaction between ions in this case has the opposite sign and favours the alternate arrangements of spins.
Then, the formation of transverse gradient of electrostatic potential in the nanoribbons is suppressed due to alternate arrangement of BN dimers in slant angle.
Lateral branches (A2) had rhythmic branching: the branchlets (A3) were distributed regularly on the leading branch, with an alternate arrangement, conforming two orthostichies on the same horizontal plane.
This unit, named A-SSHE, presents an alternate arrangement of the scraping blades that allows doubling the exchanger thermal efficiency respect to conventional SSHE with continuous blades, mainly thanks to backmixing phenomena.
It was found that insertion of Gly did not affect the thermal stability of the peptide RNA complexes, but an alternate arrangement of Gly and Agp apparently decreased the thermal stability.
In the crystal structures of both pyrimethamine m-nitrobezoate (4) and pyrimethamine p-nitrobenzoate (5), a novel type of an alternate arrangement of DADA (D represents donor and A represents acceptor) and DDAA arrays is present, resulting in the formation of hydrogen-bonded ladders.
