Forward Chaining Methodology and Graph

• Since we know the facts which affect our decisions with a fair bit of precision, we would seem to have an good condition for forward chaining of our facts to draw conclusions.
• Fishing Season are set out by law and can be exactly defined. However, overlapping calenders for different species can make a decision tree difficult to create. A Schedule looks like this:
  

  Marine Recreational Fishing Limits

  Species	Size Limits (Total Length in Inches)*	Possession Limits (Number of Fish)	Open Seasons
  Summer flounder (fluke)^	18	5	May 17 - Sept 21
  Winter flounder	12	2	April 1 - May 30
  Tautog (blackfish)	16	4	Oct 5 - Dec 14
  Bluefish (including "snappers")	No minimum size for first 10 fish 12 TL for the next 5	15 No more than 10 of which shall be less than 12" TL	All year
  Black Sea Bass	14	8 10	July 15 - Oct 31 Nov 1 - Dec 31
  Scup (Porgy)	10	30	May 1 - Dec 31
  Scup (Porgy) Anglers aboard licensed party/charter boats	10	30 45	May 1 - Dec 31 Sept 1 - Oct 31
  Yellowtail flounder	13	No limit	All year

  Reducing this to a binary tree is very difficult. Resulting leafs for any date allows for the fishing of multiple species of fish. And that is before weather conditions are considered. As a result, we need to use three modules of expert system rules to accomplish this.

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