There are lots of choices when it comes to real estate financing; then there’s one option. Option One Mortgage issues and services home mortgage loans through its loan production offices and a network of independent brokers throughout the US. The wholesale mortgage lender, a subsidiary of retail tax preparation titan H&R Block, mainly writes mortgages for sub-prime customers (those with less-than-stellar credit histories or hard-to-document income. Option One also services mortgages originated by other lenders. In 2007 H&R Block arranged to sell the company to Cerberus Capital Management, but the two sides later terminated the deal. H&R Block is now winding down Option One’s activities.

Serving as Business Rules Developer and Architect, Diwan consultants collaborated with OOMC business units to develop and document rule requirements, and design, develop, upgrade, test and implement the system. This included documenting complex internal OOMC guidelines, including Pricing rules, Eligibility rules, Conditions/Stipulations rules, High Loan Amount rules, Risk Upgrade rules, Combined Loan To Value rules via an ILOG-based rules engine. Diwan delivered the core rules structure and design, including formats, data model, eligibility rules, and variances, and modified Validation, Eligibility, and Pricing Decision Tables to handle special loan programs according to a daily schedule. Diwan also conducted a performance analysis of the Rules Engine in the Pre-Qual System through stress and concurrency testing to identify bottlenecks in the EJB server when stateless session beans are creating rules engine contexts, triggering file I/O operations and database operations. The development environment for this project included Java 1.4.1, Java Swing, ILOG Jrules 4.6, Windows XP, Stored Procedures and emacs.

NOTE: It was during this project that Diwan developed a methodology (“ontological analysis”) for designing rules engines based on natural language theory.

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