The phrase "a necessary decrease" is correct and usable in written English.
It can be used when discussing a reduction that is essential or required in a particular context, such as budgeting, resource management, or environmental concerns.
Example: "In order to meet our sustainability goals, a necessary decrease in energy consumption must be implemented."
Alternatives: "an essential reduction" or "a required decrease".
Hemodynamic explanations ("blood stealing" or "blood sharing") posit that decreases in blood flow result from changes in the need for vascular resources elsewhere in the brain, without a necessary decrease in neuronal activity in the negative regions.
Nevertheless, it is widely accepted that MYCN expression undergoes a necessary decrease during differentiation processes; otherwise, high MYCN levels lead to a neoplastic phenotype.
As majority of the volume of concrete is consumed by aggregates, there is a necessary to decrease the utilization of natural aggregates resulting in reduction of exploiting natural resources and effective utilization of construction and demolition waste.
The necessary decrease in the levels of transcriptional inhibitors occurs as the OPCs differentiate and requires the concerted action of histone deacetylases and microRNAs [55], [56].
A preoperative cervical dilatation of 5 millimetres would also make it much easier to further dilate the cervix with Hegar dilators if necessary, decreasing the risk of creating a false passage.
At the same time, results were cultivar-specific, so that a case-by-case environmental risk assessment is still necessary, decreasing its general applicability.
However, Equation (6) is a sufficient, but not a necessary condition, which decreases the MSE.
Although the controlled production of desirable polymers is possible with the utilization of fatty acid feedstocks, a central challenge to this biosynthetic route is the improvement of the relatively low polymer yield, a necessary factor of decreasing the production costs.
That would provide a necessary backstop against bailouts and decrease the political power of banks.
But it's a necessary step if you want to decrease turnover and attract the best talent to your team.
Or else, if the reservoir salinity is higher than optimum salinity of surfactant phase behavior, a preflush may be necessary to decrease the salinity of the brine ahead of the surfactant slug.
