The tool has potential. Its capabilities and visual aspects could be considered rather basic but this might improve, particularly if the business intelligence/analytics aspect is leveraged. Once running well, it could allow (perhaps smaller) companies to successfully improve their customers' experiences through digitalizing customer journey - and we all know that customer loyalty goes a long way. However, whether or not the tool is comprehensive enough to deliver this for larger companies with more complex, multi- and omni-channel interactions is yet to be seen...
As an open source rule engine and product suite, Drools is well suited for the small and middle scale business to manage and integrate the rules to build the rule-driven system which can process the business-critical data and events to produce the automated decision. It is better to use Drools in the well-secured environment (back-end behind the DMZ), not putting it on the customer-facing front or exposing it directly the to public where may bring direct security risk in the enterprise environment. Drools still needs a lot hardening on the security side.
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.
As our customers vary in size and maturity, the ROI ranges accordingly.
For younger, smaller businesses this is a useful tool. Digitalization of he customer journey has certainly helped save time and efforts in many cases.
For more mature market players the tool is not always comprehensive enough. Dashboard and report personalization take time and efforts, and sometimes it feels that a dedicated BI tool would be a more suitable solution.
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.
