We’re going to take a quick glance at very general process models. Each model represents a process from a specific perspective. Software Process ModelsĪ software process model is a simplified representation of a software process. There’s no ideal process and most organizations have developed their own software process.įor example, an organization that works on critical systems has a very structured process, while with business systems, with rapidly changing requirements, a less formal, flexible process is likely to be more effective. The software process is complex, it relies on making decisions. For example, the pre-condition of the architectural design is the requirements that have been approved by the customer, while the post condition is the diagrams describing the architectural have been reviewed. Pre and post conditions: The conditions that must be true before and after an activity.For example, the project manager, programmer, etc. Roles: The responsibilities of the people involved in the process.For example, the outcome of architectural design may be a model for the software architecture. Products: The outcomes of the activity.However, a process also includes the process description, which includes: When we talk about a process, we usually talk about the activities in it. There are also supporting activities such as configuration and change management, quality assurance, project management, user experience.Īlong with other activities aim to improve the above activities by introducing new techniques, tools, following the best practice, process standardization (so the diversity of software processes is reduced), etc. In practice, they include sub-activities such as requirements validation, architectural design, unit testing, …etc. Software evolution (software maintenance): The software is being modified to meet customer and market requirements changes.Software verification and validation: The software must conform to its specification and meet the customer's needs.S oftware design and implementation: The software is to be designed and programmed.Software specification (or requirements engineering): Define the main functionalities of the software and the constraints around them.These activities may involve the development of the software from the scratch, or, modifying an existing system.Īny software process must include the following four activities: This is a series of articles inspired by Software Engineering, 9th edition Software ProcessĪ software process (also known as software methodology) is a set of related activities that leads to the production of the software. Overloading may occur in the network if all the nodes of the distributed system try to send data at once.Software process models -Source Wikipedia.The database connected to the distributed systems is quite complicated and difficult to handle as compared to a single user system. Some messages and data can be lost in the network while moving from one node to another.It is difficult to provide adequate security in distributed systems because the nodes as well as the connections need to be secured.Some disadvantages of Distributed Systems are as follows − Resources like printers can be shared with multiple nodes rather than being restricted to just one.Other nodes can still communicate with each other. Failure of one node does not lead to the failure of the entire distributed system.More nodes can easily be added to the distributed system i.e.So nodes can easily share data with other nodes. All the nodes in the distributed system are connected to each other.Some advantages of Distributed Systems are as follows − The nodes interact with each other as required as share resources. All the tasks are equally divided between all the nodes. The peer to peer systems contains nodes that are equal participants in data sharing. Both the client and server usually communicate via a computer network and so they are a part of distributed systems. A server may serve multiple clients at the same time while a client is in contact with only one server. In client server systems, the client requests a resource and the server provides that resource. Details about these are as follows − Client/Server Systems The nodes in the distributed systems can be arranged in the form of client/server systems or peer to peer systems. Each of these nodes contains a small part of the distributed operating system software.Ī diagram to better explain the distributed system is − All the nodes in this system communicate with each other and handle processes in tandem. A distributed system contains multiple nodes that are physically separate but linked together using the network.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |