Attention to detail is a critical skill for editors. So how do you screen out editors who might not wield a virtual red pen with the chops to catch every typo, grammar problem, style issue, and the like? You could post a job ad for an editor and subtly screen out applicants that aren’t as detail-oriented by including some fine print in the description.

Second, consider getting a critique before you decide whether you need to pay for a full copyedit. I (and probably many other editors) will read your manuscript and write a several-page critique for much less than the cost of a line-by-line edit, and if your mechanical skills are reasonably good, this may be sufficient to help you get it into adequate shape for your publication plans.
This is basically like the “Quick Kill” service – or proofreading on steroids, and again we’ll hack, slash, rewrite, fix, tweak and improve anything we can, but this time we won’t comment on the bigger picture, and we’ll really hone down on the little details, eliminate repetition, trim the writing, and make sure everything is as good as it can be.

Thanks, Jessi. Everything you say is true, but for anyone reading this and feeling anxious about the EFA, I’d like to put in a good word for the organization. Established in 1970, they’ve been around for much longer than the current self-pub/e-book revolution (so: not a fly-by-night company), plus they exhibit at major events (BEA, AWP, etc), where you can meet some of the editors in person. I’ve had nothing but good experiences with their members and recommend them on my resources page.

Your last point is actually raising my eyebrow in the sense that no one ever wants to make a newbies his/her editor.But the newbies can actually have some creative editing style which the experienced one still havent gotten..A case study is the people who work in the government house or secretariat, the same way in which they draft a letter in the 90’s is still the same way they are still giving it now.But giving newbies a chance to explore their creativity can bring about great and effectual changes..

You draw distinctions that use idiosyncratic definitions of some fairly standard terms. For example, Chicago defines the terms “manuscript editing,” “line editing,” and “copyediting” as synonymous with each other, and none of them as synonymous with “mechanical editing,” although that is one element of them. Certainly, I agree that an author has a right to expect more than merely mechanical editing unless that is specifically what they have requested. However, I cannot agree that the only route into competent and appropriate freelance editing is internal employment within a publishing house, and that the only clients who should be counted as a relevant part of a freelance editor’s curriculum vitae are those who are traditionally published.
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Next, it is possible to follow the road to traditional publication without hiring your own editor, with editing being done at the publisher’s expense. However, you have to be a very good writer and self-editor to get on that road, and what you write has to fit into a very marketable niche. You also need to be very patient and willing to weather plenty of rejection along the way. Don’t jump too quickly to the conclusion that this option is closed to you. Do your research carefully. There may be a small press that is just right for your book and that will be happy to help you make it the best it can be while paying YOU rather than making you pay them.
Editing is one of those skillsets that many people claim to do well but which few actually do. And while it’s probably the most important service an author can solicit (second only to book cover design), it’s often undervalued. Furthermore, most authors have no idea how to assess an editor’s work, and the result can be catastrophic, ranging from an editor who introduces new errors to an editor who changes the intention of your writing.

The book provides further support for the importance of government-sponsored R&D by documenting numerous historical facts that demonstrate how government investments created the modern world and fueled the prosperity the world has witnessed over the past 200 years. The book also explains the origin of major technology revolutions over human history in a very accessible way. It ends with an investment strategy and a plan on how our nation can continue its prosperity for future generations.

Definitely not unreasonable, Frank. However, you have a couple of options. Rather than pay for a full developmental edit on what you have written so far, you can ask the editor to do a manuscript assessment – which includes a detailed written report. An MA is usually done for a fixed price based on the word count. Alternatively, you could ask the editor to do a sample/developmental edit on one chapter only. Using track changes, they can go through and make edits and comments. It’s good that you are already thinking of hiring an editor before you complete the MS. It will help guide you with the other 40% and revisit what you’ve written so far, so that once you are finished, the MS will be in much better shape for the next stage of editing.
There are different levels of editing—developmental, copyediting, and proofreading. I’ve found that authors are often willing to pay good money for a developmental editor, someone who walks by their side and helps to shape the book, but when it comes to copyediting and proofreading, especially if and when an author has had a developmental editor, suspicion arises as to the value or merit of these more drilled-down types of edits. Don’t let this be a blind spot; they’re important—on par with a developmental edit for sure.
Obviously there is a big difference. I actually started with screenplays (with some mild success) partly due to hearing that as long as you have a good story, the grammatical errors won’t be a big deal. Well, that was not true. Maybe if a producer liked the story or I was already established but every contest I entered always came back with feedback about the grammatical errors. Even if I won or placed as a finalist, I always received critique on that. Very little is spelling error, it was more about structure, etc.