Master Demand Analysis Fourth Chapter

The fourth chapter of the title is, the event-driven use of conditions, first of all, we first to understand what is the use of conditions, then what is the use of conditions, read-through this chapter explains that the part of the work done by the product is called use condition, because it is to analyze the response of business events to get use conditions, so there is the term

During the project start-up phase we need to break down the system into small pieces and find the parts that are part of the "natural" part that works, with the least number of connections to the rest of the work, some rules to define their scope, a boundary that can be described and quantified, and a name that can be used with familiar names from business experts. , business experts refer to customers, customers and users whose presence can easily be determined; we can identify one or more users who are experts in this part of the work.

We must first consider the scope of the work, and then break it down into smaller parts, from which we determine the use case, the general step is: to establish the scope of work, determine the adjacent system around the work, from the beginning of the contact is not affect the work of business events, research on the response to business events, determine the organization's best response to events, Identify the role of the product in response and export the requirements for each use case

1) Scope of work, we must first know how she communicates with the outside world. We can know exactly what we're studying through a contextual scope map.

(a normal contextual scope diagram that includes all the things that allow you to change and something that can't be changed)

2) Neighboring systems: Why should we consider neighboring systems? Because he can serve as a customer for our work, or he provides the services we need to work, the connections that are made through the upper and lower range map, the neighboring systems have a significant impact on the work, and the farther we look at the desired automation system, the more likely we are to discover the usefulness and innovation of the product.

3) Business events, that is, the business responds to events. These operations have a set of tasks that will be completed whenever a business event is started outside the world. The response of a business event is triggered by the arrival of the data stream, the trigger of time is outside the scope of the work control, not the work itself to evoke, once the business event occurs, the work will be initiated accordingly. That is, business events occur outside the scope of work, by arriving at the data stream, working to learn about the occurrence of the event, and then working to respond to the business event. Another type of business is a business that has a time-lapse trigger, called a time-of-day business. The passage of time means a predetermined time or period has arrived. When the pre-defined time for an event arrives, the response to the work is to complete what is required to produce the input and output. We take the response of time-line business events as our research unit, but first we need to know what time is in order to study them.

4) Discover business events. The place to look for work and communication between the outside world is the contextual scope diagram, which shows the relationship between the common group and the outside world, each of which is caused by a business event, and we can determine the business event through the research contact. Every stream of data entering the live-in is a sample. That is, each data stream raises its corresponding time, and in some cases there may be several data flows following the same event. Each data flow in a context diagram is connected to a business event and is placed in a business event. When a data flow outflow indicates that something happens, when the data flow is myopic, it indicates that an event has occurred

5) The response to the incident has a pre-planned response to each business event, that is, the work to be done whenever the business event occurs. The job response to the business event is to continue the process until all the tasks have been completed and all the data has been taken to the storage location where we can imagine a processing chain and associated storage data, noting that the data is stored around the data store and adjacent systems.

6) The roles of neighboring systems are systems that provide information and services for work or receive information and services from work. When we start with external business events, we want to consider the role or potential role of neighboring systems in the business events they initiate, because the products we build are largely determined by neighboring systems, so we need to understand neighboring systems, including active neighboring systems, Automated neighboring systems (an external entity that communicates with the work through one-way data streams, cooperating with neighboring systems (they work with our products and have received some desired results)

7) determine the best product to be built, the factors to be addressed: product objectives, context diagrams, the impact of neighboring systems from outside groups, and the market positioning identified by the organization. At the same time to establish product range

Master Demand Analysis Fourth Chapter