The Collaborative International Dictionary of English v.0.48:

Revaluation \Re*val`u*a"tion\, n.
   A second or new valuation.
   [1913 Webster]

WordNet (r) 3.0 (2006):

revaluation
    n 1: a new appraisal or evaluation [syn: reappraisal,
         revaluation, review, reassessment]

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "revaluation":
   afterthought, circulation, demonetization, devaluation,
   developed thought, issuance, mature thought, monetization,
   re-examination, reappraisal, recheck, reconsideration, reinquiry,
   rethinking, review, revision, ripe idea, second thought,
   second thoughts