"serves as a guideline" is correct and usable in written English.
You can use this phrase when referring to something that provides direction or guidance. For example, "This manual serves as a guideline for how to use the software."
The criteria and standards laid out by the Secretary of the Interior serves as a guideline to determine what is important to save and why, but not how.
Ehman said America One -- like America True, Nippon and Prada -- believed that Stars and Stripes had violated the protocol, a 16-page document that serves as a guideline for each America's Cup.
This study serves as a guideline in designing innovative high performance rotating LHTES.
The principle of invariancy serves as a guideline for the decomposition of the task space into force and position subspaces.
This condition serves as a guideline for the choices of the proper protocol parameters L,K, and p th.
As compared to Switzerland, the methodology serves as a guideline and example for the federal states and municipalities.
United Nations cartographers have prepared a map, they said, but it needs approval by the Security Council before serving as a guideline for the withdrawal.
The Supreme Court's ruling on student fees covers only public colleges and universities, but it ought to serve as a guideline for similar struggles at private institutions as well.
The ChEBI ontology could serve as a guideline for how relationships between metabolites should be specified.
The peer-tree indexing structure can serve as a guideline for forwarding location updates and queries.
This framework can serve as a guideline for designing future nutrition interventions.
