miscalculation          
noun [ C or U ] uk/ˌmɪs.kæl.kjəˈleɪ.ʃən/ us/ˌmɪs.kæl.kjəˈleɪ.ʃən/
 误算
a calculation that has not been done correctly, or the act of calculating something wrongly
  The project went over budget because of a miscalculation at the planning stage. 由于计划阶段的误算,该项目超出了预算。 
 They are calling for a recount because of errors and miscalculations in the compilation of the poll result. 由于民意调查结果编制中的错误和误算,他们要求重新计票。 
  误算
a wrong judgment about a situation
  The conspirators' plot failed because they made two fatal miscalculations. 阴谋者的诡计失败了,因为他们做出了两个致命的误算。 
 I think they were trying to cover up for their grossly negligent political miscalculation. 我认为他们是在试图掩盖他们严重疏忽的政治误判。 
 See: miscalculate
 - More examples
 - He said it was necessary to find out exactly how the miscalculation occurred.
 - Due to a slight miscalculation on my part, my new sofa wouldn't fit up the stairs.
 - This conflict is the result of a grave miscalculation.