The phrase "are essential for efficient" is correct and usable in written English.
It can be used when discussing the importance of certain elements or factors that contribute to efficiency in a process or system.
Example: "These tools are essential for efficient project management and timely delivery."
Alternatives: "are crucial for effective" or "are vital for optimal".
Clearly defined policies and procedures are essential for efficient operation and maintenance of any railroad — military or civilian.
Natsuaki Y, Egawa G, Nakamizo S, et al. Perivascular leukocyte clusters are essential for efficient activation of effector T cells in the skin.
In this chapter, we employ a number of compression techniques for dictionary and inverted index that are essential for efficient IR systems.
Organization of trial records and interpretation of results are essential for efficient review of data packages by regulatory authorities and accurate communication of results to the industry.
Nerve conduits containing highly aligned architecture that mimics native tissues are essential for efficient regeneration of nerve injuries.
Experimentally determined cloud points for biphasic acetonitrile systems are essential for efficient design and extraction process development for the recently proposed and effective oxidative desulfurization method.
For instance, high temperatures disrupt the thylakoid membranes47 or the D1 protein of photosystem II40, which are essentials for efficient photochemical energy transduction.
Good teamwork is essential for efficient operations on scale.
Fernandez-Vazquez, J. et al. Modification of tRNA Lys) UUU by elongator is essential for efficient translation of stress mRNAs.
Signaling molecules for cilium-associated pathways are concentrated in the cilium, and this is essential for efficient signaling.
Supporters argued that the change was essential for efficient government; opponents called the end of local self-government un-American.
