(a) General. Work experience means skills and abilities the claimant has acquired through work he or she has done which show the type of work he or she may be expected to do. Work the claimant has already been able to do shows the kind of work that he or she may be expected to do. The Board considers that the claimant's work experience is relevant and applies when it was done within the last 15 years, lasted long enough for him or her to learn to do it, and was substantial gainful activity. This work experience is called “past relevant work.” The Board does not usually consider that work the claimant did 15 years or more before the time the Board is deciding whether he or she is disabled (or when the disability insured status requirement was last met, if earlier) applies. A gradual change occurs in most jobs so that after 15 years, it is no longer realistic to expect that skills and abilities acquired in a job done then continue to apply. The 15-year guide is intended to insure that remote work experience is not currently applied. If the claimant has no work experience or worked only “off-and-on” or for brief periods of time during the 15-year period, the Board generally considers that these do not apply. If the claimant has acquired skills through his or her past work, the Board considers the claimant to have these work skills unless he or she cannot use them in other skilled or semi-skilled work that he or she can do. If the claimant cannot use his or her skills in other skilled or semi-skilled work, the Board will consider his or her work background the same as unskilled. However, even if the claimant has no work experience, the Board may consider that the claimant is able to do unskilled work because it requires little or no judgment and can be learned in a short period of time.

(b) Information about the claimant's work.