The phrase "need considerable improvement" is grammatically correct and can be used in written English.
It is typically used to express that something is not satisfactory and requires a large amount of work to become better. You can use it when evaluating something or giving feedback on a product, service, or performance. Example: "The company's customer service department is performing poorly and needs considerable improvement in order to meet customer expectations."
In most cases, prevention and treatment are either non-existent or need considerable improvement.
However, Chappell warns that the tourists need "considerable improvement" from their batting line-up if they are to have any chance in the Ashes.
The Egyptian code gradually introduced ductility concepts and detailing procedures through its versions (ECP 2001, 2004b, 2007), although these aspects of the code still need considerable improvement and development.
Spinel-type CoMn2O4 materials are promising catalyst for heterogeneous activation of peroxymonosulfate (PMS), but the catalytic activity still need considerable improvements for practical environmental application and the underlying Co-Mn synergy is unclear.
However, efficiency of a MFC still needs considerable improvement and fabrication cost of it needs to be reduced to consider it as a commercially viable option.
The quality of reporting for weight loss studies needs considerable improvement.
The completeness and comparability of stage data routinely collected by population-based cancer registries needs considerable improvement to facilitate comparisons of survival by stage.
Currently, there is evidence that analgesic management still needs considerable improvement [ 5] and consequently, a better understanding of analgesic use is essential if we are to improve this element of musculoskeletal pain management.
City, in stark contrast, will need a considerable improvement from last season if they are to achieve their minimum target, namely to reach the knockout stages for the first time.
The whole notion clearly needs considerable scrutiny and debate; but it does appear to be a positive improvement on the 'competing currencies' proposal of his predecessor Mr Lawson.
Sanitation standards in Mongolia are also in need of considerable improvement.
