i want to compute a final score for each document by summing the weighted scores of multiple fields scores,instead of getting the MAX as the edisMAx query parser does.

So if i got three fields;title and description, i want my final score to be like this:

FINAL SCORE = w1 \* title\_field\_score + (1-w1) \* description\_field\_score + (1-w1 -w2) \* description\_field\_score

Where w1,w2 can be values between 0 to 1.

The default similarity with no any simialrity gives this [ranking](http://explain.solr.pl/explains/l51qt6id). This uses the following search handler:

```
  <requestHandler name="/select" class="solr.SearchHandler">
 <lst name="defaults">
   <str name="echoParams">explicit</str>
   <int name="rows">10</int>
   <str name="df">detail_page_text</str>

   <!-- Query settings -->
   <str name="defType">edismax</str>
   <str name="qf">
      job_title description detail_page_text
   </str>

```

now by using the tie as below, seems that we getting a ideal [ranking](http://explain.solr.pl/explains/2twcjbmf). 

```
<str name="tie">1.0</str>

```

So my question is if the use of the tie parameter is the right way to achieve a weigthed ranking score based on all fields equaly(or with additional weights). 

Any tip would be much appreciated!
Cheers