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An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships that can exist between entities (instances of those entity types).
The payroll module automates the pay process by gathering data on employee time and attendance, calculating various deductions and taxes, and generating periodic pay cheques and employee tax reports. Data is generally fed from human resources and timekeeping modules to calculate automatic deposit and manual cheque writing capabilities.
Resources, events, agents (REA) is a model of how an accounting system can be re-engineered for the computer age.REA was originally proposed in 1982 by William E. McCarthy as a generalized accounting model, [1] and contained the concepts of resources, events and agents (McCarthy 1982).
Example of a system context diagram. [1] A system context diagram in engineering is a diagram that defines the boundary between the system, or part of a system, and its environment, showing the entities that interact with it. [2] This diagram is a high level view of a system. It is similar to a block diagram.
The Chinese University of Hong Kong [b] (CUHK) is a public research university in Sha Tin, New Territories, Hong Kong. Established in 1963 as a federation of three colleges – Chung Chi College , New Asia College , and United College , [ 3 ] it is Hong Kong's second-oldest university, with the first being the University of Hong Kong .
Activity diagrams [1] are graphical representations of workflows of stepwise activities and actions [2] with support for choice, iteration, and concurrency. In the Unified Modeling Language , activity diagrams are intended to model both computational and organizational processes (i.e., workflows), as well as the data flows intersecting with the ...
The Chinese University of Hong Kong, Shenzhen (abbreviated as CUHK–Shenzhen or CUHK–SZ) is a university in Longgang, Shenzhen, Guangdong, China. It was established under a partnership between the Chinese University of Hong Kong and Shenzhen University. The university was approved by the Ministry of Education of China on 21 March 2014.
It emphasizes what must happen in the system being modeled. Since behavior diagrams illustrate the behavior of a system, they are used extensively to describe the functionality of software systems. As an example, the activity diagram describes the business and operational step-by-step activities of the components in a system.