I'd like to throw in a few points here, and bear in mind the system changes all the time, so my advice might be somewhat dated, but:
1) Before one puts in a Redress of Grievance, ensure you read the process. Completely. Jumping to filing a Redress without going through the COMPLETE process is like going straight to the Ombudsman because you think think someone harassed you, kinda-sorta. There is a step called "mediation" (if my memory serves correctly) which is the lowest level action that should be taken, and then if you aren't satisfied, bring it to the next level. I find people are too quick to jump right to the highest possible resolution, not realizing that there are alternative steps that
could result in the same outcome, without the administrative nightmare that higher level actions create. And so it goes for harassment complaints, discrimination, etc, etc......
2) Keep in mind that just because you redress something, it doesn't mean that your PER will improve. In fact, it can go down, if the people start investigating your performance, and all the documentation shows that you should be lower than it [the PER] currently shows (i.e whomever was writing your PER screwed up on more than a few counts, not including the parts that you weren't thrilled about). Has this ever happened? Unlikely, but it is a possibility.
I know that there are enough barrack block lawyers around that will tell you that it is your 'right' to redress a PER that you are not satisfied with (Lord knows I should have redressed a few.....), and some of the BS policies or directions that I have heard about within units ("Everyones scores WILL be higher than they were last year!!!!", "Only RMS clerks can have "Mastered" for Administration on their PER's.....") don't help people's understanding of the process. Reading the Documentation (handbook, word picture book, etc) helps. CFPAS 2007 for home available here:
http://www.forces.gc.ca/cfpas/engraph/CFPAS_Download_e.asp. There are too many crap PDR/PER's written because people don't take the time to learn/understand what is expected of them as a) the one writing the assessment, and b) the one being assessed.
Allan