The phrase "are needed for producing" is correct and usable in written English.
It can be used when discussing the requirements or resources necessary for the process of production in various contexts, such as manufacturing, agriculture, or content creation.
Example: "The raw materials and skilled labor are needed for producing high-quality furniture."
Alternatives: "are required for creating" or "are essential for manufacturing".
However, a prospective, controlled randomized trial comparing standard treatment to MTP as part of managed care is needed for producing a real proof of effectiveness.
Tomatillo plants are not self-pollinating; at least two plants are needed for both to produce fruit (each plant yields about 60too 100 tomatillos per season).
ROS, such as the superoxide anion, hydrogen peroxide, and nitric oxide, are needed for fertilization, and thus are produced by spermatozoa.
This approach, however, underestimates the required efforts and the necessity of developing good logistics, which are needed for handling of fresh produce.
Water treatment technologies that employ sustainable driving forces for treatment of high ionic strength, complex feed streams and have the capacity to separate a broad range of contaminants are needed for economical treatment of flowback and produced waters in the oil and gas industry.
Overall these released "danger signals" can stimulate the APC that are needed for tumor immunity, which is subsequently produced after mM-CSF cells are killed by the macrophages.
Copper wire, redstone, and refined iron (made by smelting iron ingots) are needed for (arguably) the most important IC2 produced material, the electronic circuit.
He said factories are needed for reasons beyond the tangible goods they produce.
Knowledge users were considered to be the connection to the health system that is needed for the knowledge produced through research to have an impact on health outcomes.
They may even cause milk secretion, because the tumor can secrete prolactin, a hormone that is needed for fertility and to produce milk in the breasts.
