功能分析是价值工程的核心，功能分析的目的是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27079' and id < 2244617 and id<>'2244617' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27079' and id > 2244617 and id<>'2244617' order by id asc limit 5