Standard computer control products in industry: which statement best reflects their availability and practicality?

Introduction / Context:
From PLCs and motion controllers to industrial PCs and I/O modules, standardized control products are widely used to automate processes. Knowing their availability and cost profile helps engineers specify reliable solutions without reinventing core components.

Given Data / Assumptions:

• We are discussing “standard” products rather than one-off custom hardware.
• Vendors provide catalogs of certified, interoperable components.
• Commodity availability generally lowers the barrier to adoption.

Concept / Approach:
Off-the-shelf control products are stocked by distributors and come with documentation, certifications, and support. They tend to be cost effective due to economies of scale and competition. Integration costs still exist, but component availability is not the limiting factor. These products absolutely exist and are, in fact, the default choice in modern plants.

Step-by-Step Solution:
Evaluate each claim against industry reality.Select the statement that aligns with widespread, practical availability: off-the-shelf.Reject claims of non-existence or universal lack of cost-effectiveness.

Verification / Alternative check:
Major vendors offer extensive catalogs of controllers, drives, and I/O with short lead times, confirming off-the-shelf availability.

Why Other Options Are Wrong:
“Very expensive and not cost effective” overgeneralizes; many products are competitively priced. “Do not exist yet” is plainly false.

Common Pitfalls:
Assuming customization is always necessary; often, standard modules meet requirements with minimal configuration.

Final Answer:
are available off the shelf