Every time I meet a new person and have the regular get-to-know-you conversation, I get the typical questions: Where are you from? What do you do? Where do you work? What do they do? Now, working for InRule, I face an additional question: what is a business rules engine? It has become obvious that many people – at least people in my world – do not know the answer to this question. To help my new friends and the silent techies who also may not know about business rules and business rules engines, here is a short summary.
To start, let me quickly define business rules. Business rules are guidelines that help you determine, define or constrain the criteria or conditions that help you make a decision. These decisions affect certain aspects of a business.
Think about when you apply for a loan. There are questions that you must answer in order to get a loan, and your answers determine whether you qualify for the loan.
In most loan processing applications, there are various rules that fire based on your responses to questions. If you answer yes to one question or no to another question, your chances of approval for a loan will be impacted, and the subsequent questions will vary. These rules help guide you through the application process and help the company determine your eligibility and structure their business.
A business rules engine, commonly referred to as a BRE, is software that executes these business rules or decision logic, separately from application code. Managing business rules outside of code enables them to be maintained without programming, often by less technical users.
For example, the rules that determine whether you qualify for your loan and if so, the loan rate, can be separated from code so that as marketplace conditions or industry regulations change, the rules associated with lending—rules associated with minimum income, credit score or debt to loan ratio, etc. —can be updated without a developer sifting through code. Separating business logic from application code makes it easier and faster to change business rules.
A business rules engine is part of a larger system called a business rules management system, or a BRMS. In part two of Back to Basics, I’ll discuss what a BRMS is, how a BRE sits inside of it, and examples of its use.
Whether you’re a new friend who has no idea what I do for a living, or a techy who wanted to learn more about business rules engines, I hope you found this summary to be helpful. If you have any more questions, feel free to drop me a line below in the comments section.
Editor’s Notes: Be sure to read Part 2 of Pete’s series here.
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