Integrated system for rule editing, simulation, version control, and business process management

System and method for managing one or more rules for use with an application program in a data processing system is provided. An integrated user interface is provided to enable users to access an integrated application development system that enables version control and business process management of rulesets, each ruleset including one or more rules. In response to instructions from a first user, a particular version of a ruleset is checked out from the repository, the ruleset is transitioned from a first state to a second state, and the ruleset is checked back into the repository. A log data object associated with the particular version of the first ruleset stores (i) information specifying which user checked out the ruleset from the repository and which user approved the transition of the ruleset from the first state to the second state, or (ii) information specifying a timestamp indicating when the ruleset was checked out from the repository, and a timestamp indicating when the ruleset transitioned from the first state to the second state.