Drools is an open source business rules management system developed by Red Hat.
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IBM Operational Decision Manager
Score 7.1 out of 10
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IBM Operational Decision Manager is presented as a comprehensive decision automation solution that helps users discover, capture, analyze, automate and govern rules-based business decisions, on premises or on cloud. It is formerly known as the IBM Websphere Operational Decision Management, and before that as the ILOG JRules Business Rules Management System (BRMS).
Drools is well suited for big projects where business logic and rules must be separated from program code. So they can evolve when business evolves without being tied to code evolution and deployment.
IBM Operational Decision Manager can be used to manage complex business processes with less use of IT infrastructure and more use of centralized decision making. Decision-making depends on a logical framework and the creation of commands for better futuristic decisions with less time consumption and more precision and accuracy. IBM's Operational decision manager application is well suited for such scenarios where complex processes have to be streamlined.
Fusion doesn't support persistence of working memory, which brings some extra high availability risk to our business.
Guvnor still has a lot room to be implemented, it is not so user-friendly for non-technical people, so a lot of business users complain it is hard to master.
Rule execution server doesn't even have JMX implemented, hard to be monitored.
Drools is still lacking support for key Web services standards.
There is some confusion for users as they have many different tools and consoles to use and write/edit rules. There is the rule designer, an enterprise console, a business console, etc and there is overlapping functionality between the consoles.
There needs to be support added for creating models using the decision modeling notation (DMN). Businesses need to be able to represent the knowledge using a model and DMN is a standard way of representing the information.
Also to be able to import and export models that have been created using DMN. There are tools that companies use to create DMN models and represent the business domain and logic. This tool needs to be able to import those models and provide execution runtime for the same.
OpenRules provides the non-technical Excel way for a business user to easily modify and manage the rules. Sometimes we found Drools is a little bit overkill for some small and quick projects and we found Roolie is a not bad option as Drools alternative.
A lot of firms will have their own pseudo-rule engines that are tailored to the application, but adopting open source frameworks like Drools IBM Operational Decision Manager includes an English-like rule language, an IDE for defining vocabulary and rules, an easy interface for creating rule applications from scratch and deploying them, as well as tools for testing them locally, through API, and via simulations.
The IT department quickly adopted Drools as it is a very good java-based rule engine, which saves a lot of time to meet the project timeline and balanced our business requirements.
Recently we start considering the OpenRules, which may be more business user-friendly.
