Dear member,
The replies to your questions are as below:
a) Do I need to mention the missed deadlines in my self-assessment?
Reply: - If you write about missed deadlines in your self-assessment, then it will show that you take cognisance of your failures. If you do not write, then it could be interpreted that you are unconcerned or you do not even have a trace of remorse. Nevertheless, to justify the missed deadlines, do not do rationalisation by saying that in the past you did not miss them so what if you do it for the first time?
The heading of your post is "writing negatively on Performance Self-assessment". While providing the reasons for the missing deadlines, you need to be truthful. For the sake of being "positive", one cannot be untruthful. Neither positive thinking demands camouflaging the truth by falsehood. Therefore, come out of the trap of "positive thinking". Yes, positive thinking is important. To project, you are a positive person, you may show to the reviewer the action plan so that the problem of the missing deadlines does not recur.
(b) If I mention it, will I be perceived as a person with health issues, and someone who cant cope with the workload?
Reply: - The perceptions of the reviewer of the self-assessment will depend on what you write. What exactly was the "health issue"? Have you started suffering due to chronic disease? What medical treatment are you taking? Has the treatment shown tangible improvement? In your post, you have written the reasons for missing deadlines as "which I think was due to health, and other work pressures". What kind of "other work pressure" was it? Were you given more tasks than you could one but in the bargain you had bitten more than you could have chewed?
By the way, what is the meaning of "which I think was due to health"? Why you are "thinking"? Why are you uncertain about the reasons for the missing deadline? Is it that you are searching for the reasons and wanted to push "poor health" as the reason?
c) what impact will it have when I change employers, and they want copies of my previous performance evaluations.
Reply: - The performance evaluation or assessment is the internal matter of the company. The employers, while hiring a job candidate are expected to create robust recruitment practices so that they can filter out the unworthy candidates. However, they cannot rely on the performance evaluation done by the past employer of the candidate. Nevertheless, if some employer approaches the old employer to furnish the records of the past evaluations, most probably this strange demand could be declined. Therefore, your concerns on this count are unfounded.
Thanks,
Dinesh Divekar