I wrote about Ford’s selection of former Boeing Commercial Airplanes President Alan Mulally as its new CEO on my blog AeroGo. As I note there, I don’t agree with William Clay Ford’s assertion that there are many parallels between Boeing’s recent challenges and Ford’s.

In a narrow sense, maybe yes, you can say that Ford needs to renegotiate union and supplier contracts, etc., but really Ford Motor Co. has been its own worst enemy, and is much more a victim of its own ineptitude and lack of decisiveness as any external circumstances. It was only a few years ago that it was the strongest of the Big Three, and now it appears to be the weakest.

If you want to draw parallels, a much better comparison could be made between Ford and Apple Computer than Ford and Boeing. As a long-time Apple user, I can assure you that Apple has long been its own worst enemy. Even when Apple did make outstanding products at intelligent price-points, for years it would suffer severe logistical problems that cut into the potential gains. Even in recent years, I suspect continuing skepticism of Apple’s ability to ramp up production of hot products is one reason folks underestimated its iPod business for so long.

The difference with Apple now is that it finally has a clear, focussed direction for its products and the brand is healthy again. In the same way, Ford needs to make up its mind what kind of car company it is and develop clear differentiators for each of its brands, whichever ones it decides to keep.

It wasn’t too many years ago that William Clay Ford was declaring that Ford was going to be a leader pushing for better fuel economy and lower emissions. Along came a few problems, and apparently that vision was tossed, and now, with gas prices up and highly dependent on truck sales, the failure to follow through on that vision is really hurting them.

Product-driven companies like Apple and Ford must set a course and stick to it long-term, and not constantly adjust to every external up and down, whether in the market for their products or their stock. Even recently, nearly a decade into Apple’s turnaround, analysts were calling Apple’s plans for the Mac unrealistic, that they needed to focus on market share, etc. Of course, the reality of the computer business has long been that significant market share gains are made on the mistakes of one’s competitors, mistakes which are all too common, and which even Microsoft has been making of late.

In other words, stability and staying the course are far too under-rated. On the other hand, there is one crucial difference between Apple and Ford - even when things were their worst, Apple had large cash reserves, something Ford may not be able to count on. But any “quick fix” that damages the Ford brands will probably just end up making things worse.

The sad thing is, William Clay Ford’s “greener” vision for Ford may well have been on the mark, and it’s a shame they didn’t stick to it. Perhaps a return to his vision coupled with Mulally’s demonstrated management ability can turn the company around. As with Apple, there’s probably a lot more life left in the Ford, Lincoln, Volvo and Jaguar brands, at least, if they can set a clear direction and stick to it. For a few years things may not look so good, but a consistent product vision will eventually yield leading products and strongly-differentiated brands.