Business rules and information systems: aligning IT with by Tony Morgan

By Tony Morgan

Details structures frequently fail simply because their requisites are poorly outlined. This booklet indicates IT execs the way to specify extra accurately and extra successfully what their platforms have to do. the major lies within the discovery and alertness of what are known as company principles. A company rule is a compact and straightforward assertion that represents a few vital element of a company. through shooting the foundations in your company - the good judgment that governs its operation - you'll achieve the power to create structures absolutely aligned along with your enterprise needs.In this ebook, Tony Morgan presents a radical advent to company ideas, in addition to a realistic framework for integrating them into info structures. He exhibits you ways to spot and exhibit company ideas, bargains useful thoughts for his or her use, and explains the major components of good judgment that underpin their application.Topics lined include:# realizing the position of commercial principles and versions in details platforms improvement# utilizing versions to constitution and deal with enterprise actions, together with e-commerce# Defining and studying enterprise ideas# Controlling company rule caliber# becoming enterprise principles into various technical architectures# imposing company principles utilizing to be had technologyWhether you're an analyst, dressmaker, developer, or technical supervisor, the in-depth details and functional viewpoint during this worthwhile source will consultant you on your efforts to construct rule-centered info structures that absolutely aid the ambitions of your company.

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Simple loan model We'll focus on the interestRate attribute. The initial analysis has identified the need to hold the interest rate applicable to the loan. This would be a percentage figure that can be used for such tasks as calculating repayments. Different kinds of loans may have different interest rates, so the Loan class looks like a good home for this attribute. Later, though, it might turn out that a rate is more complicated than we first thought. We might need to allow for loans that have a variable rate, such as 2 percent above base rate.

A convenient UML representation for generalization/specialization relationships of this sort looks like an open-headed arrow pointing toward the more general class. Figure 2-3 shows a generic class with some attributes, together with a couple of subclasses. Figure 2-3. Class diagram with specializations In this diagram, the Party class represents an external entity that is—or has been or might be—involved in a business relationship, such as a customer, a supplier, a business partner, or something equivalent.

These changes can, and probably should, be made completely independently of the major business functions. That's not to say that user interfaces are unimportant. On the contrary, they can have a big effect on the success of an e-commerce site. They're simply a different subject, and trying to include them in our present concerns would just be confusing. The business functionality we'll be defining could work with pretty much any kind of interface: browser, Win32 GUI (graphical user interface), even character-based green screens.

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