SWOT stands for (an analysis of) strengths, weaknesses, opportunities, threats. There are four "fields" and yes, four suits.
Here's an example from this deal, which came up in today's New York Post. West opened 1 diamond, South doubled (takeout), and later bid 4 hearts after North's (forced) response.
Jxxxx QT Jxx Qxx
KQxx xx xx xx AKQTx xxx xx KT9xxx
Ax AKJxxxx xx AJ
The trump suit is solid, that is a strength. There are two diamond losers, that's an obvious weakness. With seven trump tricks and two black aces, the club suit an represents opportunity for the 10th trick the QJ together are worth one trick. The spade suit is the threat, you don't want a spade loser.
After south ruffs the third diamond, he should lead the jack of clubs to either steal a trick or force out the king. He then wins any return, draws trumps in dummy, and leads the Q of clubs to discard his low spade.
But South played A, then J in clubs, and went down when East won and led back a club for West to ruff.
Does SWOT analysis make it easier to focus on where the "problem" lies in the hand?