The phrase "justifying the need for" is correct and usable in written English.
You can use it whenever you are providing evidence that something is necessary. For example, "This report provides data justifying the need for more investment in education for disadvantaged youth."
"Development will continue while they are doing more studying, and they will see the creation of even more traffic justifying the need for Route 92," Mr. Pizzutillo said.
Its outcome is usually a conclusion that there are no qualified Americans to hire, justifying the need for the government to issue the visas.
Some techniques, such as watertight barriers and injection of hydrofuge products, that have been used until now to deal with rising damp, are sometimes ineffective, justifying the need for a new approach.
It is found that LEFM usually overestimates the debonding load, thus justifying the need for the proposed approach; on the other hand, debonding load estimates based on FFM are in excellent agreement with the CCM predictions.
The total value of species harvested was distributed across a large number of sites, justifying the need for a regional management approach to ensure the maintenance of diverse habitats for hunting and fishing.
Conservation organizations on the ground are in a constant balancing act, often justifying the need for immediate conservation interventions as higher priority than the need for more accurate documentation of the demise of the species.
This introductory chapter describes the scope of the book and justifies the need for its publication.
The ongoing use of various mineral additions along with chemical admixtures such as superplasticizers justifies the need for further research.
I believe the study may be slightly flawed as it does justify the need for good diet and exercise.
Variation in polyp detection among endoscopists has been used to justify the need for establishing quality standards for colonoscopy performance.
These remarkable results justify the need for larger clinical trials in other solid tumors, including gynecologic malignancies.
