"pre requirements" is a correct and usable phrase in written English.
It is typically used to refer to conditions or qualifications that must be met before something else can happen, be done, or be obtained. Here is an example: "Before enrolling in the advanced physics class, students must meet the pre requirements of completing the introductory course and passing the placement exam."
Others are more general, with pre-requirements spread over several areas.
Replacing glass fibre by natural one in reinforcing engineering plastics for electronic industries has two pre-requirements.
The panorama shows a wide diversity of pre-requirements and arguments, some very specific and superficial, others more general and deep.
According to Rowe and Leaney [145], evolvability is the ability to self-adapt to changes in the environment, pre-requirements, or technology changes.
This chapter introduces the basic concept of vibration measurement, illustrates the pre-requirements for vibration testing and environment testing, and provides tips for the installation of vibration objects.
As a result, a signal-processing designer develops complex applications at a high level and can put the implementation on a complex architecture without any hardware pre-requirements.
This framework is applied on a case-study in order to propose physical-physiological pre-requirements of a sound perception artefact by a field operator.
A future work is to determine how each of these selected technologies could be combined to meet overall project pre-requirements, how they interrelate with each other creating dependencies, and how every technology can take deep advantage of the others.
One of the pre-requirements for a reliable network with multiple sinks is the availability of a reliable network between the different sink nodes to coordinate the synchronisation between the sinks.
The fact is that one or more of these issues are generally left to a further stage of the design or to other approaches, making it much more difficult to meet pre-requirements and to eliminate inconsistencies.
