The phrase "are needed to arrive" is correct and usable in written English.
It can be used when discussing requirements or prerequisites for reaching a destination or achieving a goal.
Example: "Several documents are needed to arrive at a successful conclusion for the project."
Alternatives: "are required to reach" or "are necessary to get to".
It is recommended that both a better design model and further tests are needed to arrive at satisfactory design criteria.
The approach is accurate, general and valid for all frequency ranges, since no simplifying are needed to arrive at the presented power flow relations.
If yes, then such factors can be proposed to play a role in genome size variation due to their effect on the amplification/deletion of specific transposons, although detailed analyses are needed to arrive at any such conclusions.
Further studies including these endpoints are needed to arrive at firm conclusions.
Survey-based methods are one important method, but other methods such as electronic queries, time-motion studies, and qualitative analyses are needed to arrive at a complete portrait of an information system.
But more experiments are needed to arrive at a conclusion; particularly important are experiments to test the response of wild seeds in environments under in situ management and cultivation, and the reciprocal treatments.
Further R&D and experimentation is needed to arrive at commercially viable designs of PCM heat storage units.
A broad package of policies will be needed to arrive at this goal — industry innovation, awareness-raising campaigns, nutrition education, cooking skills and, however contentious, a tax on the most environmentally damaging products.
More work will obviously be needed to arrive at a comprehensive plan for recycling, and the mayor should consider finding an expert with a track record to do it.
More discussion is needed to arrive at an algorithmic description of which (modified) Wilson network to use when modeling a given experiment.
Future research is needed to arrive at a better interpretation on how and why diversity is associated with performance-oriented classroom assessment environment in the Chinese educational context.
