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The systems development life cycle
The traditional the system development life cycle
Limitations of traditional system development life cycle
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System Development Life Cycles
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System Development Life Cycles or SDLC's have been with us since time
began. Every invention ever made or thought of must have at some stage
undergone a process of few or many stages before it was either
implemented, scrapped or both.
It is through these various stages we as people have developed the
world and everyday items around us, so it was only a matter of time
(the late 60's) before we refined and implemented these design
structures to be used within the fledgling computer industry.
There are many different systems in use today, no one of them being
better than the next but when choosing one you must be confident that
it's right for the project you are about to embark on.
Waterfall Model
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The waterfall method of system design was developed during the late
1960's. It was the first attempt at a methodical approach for system
design. It is a completely methodical and comprehensive approach with
different stages to follow throughout the process. The objectives of
such a system are threefold, firstly to ensure that a high quality
system is delivered, secondly to be able to maximize the productivity
of the systems staff and lastly to provide strong management control
over the system production. The main stages of development are:
1. Feasibility study
This is where we carry out and gain an understanding of the customers
SDLC( Software Development Life Cycle) , is a process used by the software industry to design, develop and test high quality software .The SDLC aim to produce good quality software that meets or exceeds the user’s expectation and reaches completion within time and cost estimates.
The impact of genes and environment on human development has been a controversial debate for a long time. On one hand, some people claim that nature is the sole determiner of human development; on the other hand, others assert that nurture is the only determiner of human development. In this paper, possible roles of both biology and environment on cognitive abilities will be discussed through providing a balanced interpretation based on the text and relevant readings from the class.
The different stages of the project lifecycle are clearly spelt out in the WBS, allowing management to precisely identify which components are causing cost or schedule overruns and to more effectively mitigate the root cause of the overruns; USDOE (2012, p. 5) and provide specific insights into the relationship among scope, schedule, budget, and performance (p. 7).
I feel as though the label Moderately Monochronic perfectly describes who I am. Typically, when tackling a project I generally have an idea of what I am going to do and follow through this plan in order to be done by the due date. This is partly due because I believe that everything is easily done and handled in a chronological order, and if it is not I will stress out and immediately stop working to come up with a strategy. The plan will help me concentrate on the task in hand and finish the project on time, as well as measure my progress and insure that I would finish it on time. I view that completing the project is my top priority and would like interruptions as minimum as possible. I do enjoy talking with others at the beginning of the
After the systems planning is complete, the next course of action is the systems analysis phase. This phase includes defining the requirements of the system. This means that the team must conclude what the system needs to do in order to satisfy the users. This is done by forming a requirements...
The Systems Development Life Cycle (SDLC) consists of phases used in developing a piece of software. It is the plan of how to develop and maintain software, and when necessary, replace that software. In 2007 during my hospital’s transition to a new software system, I was fortunate enough to be included in the process. I did not get involved until the implementation phase, but from then on, until now, I remain very active in the process. I decided to highlight the Waterfall Model of SDLC. The Waterfall Model is a “sequential development process” with each phase continuing in a line (McGonigle and Mastrian, 2012, p. 205).
It is very simple to understand and use. In a waterfall model, each phase must be completed in its entirety before the next phase begin. At the end of each phase, review takes place to determine if the project is on the right path and whether or not to continue or discard the project. In this model the testing starts only after the development is complete. In waterfall model phases do not overlap.
The Waterfall model is more or less totally linear in progression with six specific stages being undertaken in chronologically descending order. The first stage is known as the Requirements stage, in which the document of product requirements is created for future reference. The Design procedure is the second stage, which culminates in the architecture for the base software. Next, the Construction stage occurs, where the implementation of coding upon the base architecture results in the actual software being created. The fourth stage is Integration, where the software is made ready for the systems that it will become a part of, merging it to create the first step of the final product. Testing and debugging then occur to make sure that Integration worked as planned without the introduction of new errors due to the integration or that old mistakes do not take on a new potency due to the change in the software. Finally, Installation of the product occurs, finishing the product, which is taken up by the Software and the Maintenance steps of the six-stage Waterfall model. There are non-traditional variations of the waterfall method, but these are not relevant to the current discussion, and as such, will not be covered at this time.
As part of developing the need in the initial investigation step in the systems development life cycles (SDLC) process, a constructive method is use case. Use case is a technique for capturing requirements with written scenarios in non-technical terminology that describe how a system interacts with a user or another system (University of Phoenix, Course Syllabus, 2006). There are two fundamental pieces, along with how they relate, to bear in mind: the actors and the goals. The actors are everyone and everything that will use (or be used) by the project progress reports, and the goals, which are what the actors want to achieve. The use case will describe the goals achieved by the actors who perform tasks (Carr & Meehan, 2005).
Based on this week’s discussion which is based on comparing the classic Software development life cycle (SDLC) to the Microsoft's Security Development Lifecycle(SDL). I would want to say that the Software Development Lifecycle is a structure which defines tasks to be performed at each step in the Software Development. And on the other hand, the Security Development Lifecycle(SDL)is a process which helps developers creating software applications to make them more secure and address the security compliance by reducing development cost.
Human development is a progressive change in people’s lives over time enables them adapt more effectively to their environments. (Shaw, Haxell & Wblemoe, 2009).My development was interesting in every stage because many things influences my life during my development. Social – cultural and moral are the domains that influences my development during middle childhood and adolescence stage.
Consequentially, the Waterfall consists of seven procedural steps followed in linear order, but possess small gates where information, specifications, and designs are reviewed. The seven procedural steps performed by software companies, according to Lotz (2013): “1. Gather and document requirements, 2. Design, 3. Code and unit test, 4. Perform system testing, perform user acceptance testing (UAT), 6. Fix any issues, and 7. Deliver the finished product.” However, the Waterfall methodology clear and defined linear plan provides development teams distinct guidelines for each phase of development, but the methodology still possesses pros and cons for usage. The advantages of the methodology are discipline provided by the procedural phase structure, current phase of the development team easily identifiable by vendor and client, and provides efficient knowledge transfer between team members. (Melonfire, 2008) Furthermore, the associated disadvantages of the methodology are the phases are not flexible to change, developers cannot return to a previous phase, and originally develop designs are not feasible. Finally, the trait of not being flexible deems Waterfall appropriate for well-defined projects, and projects with a fixed-price, a fixed-timeline, and a none adjustable scope. (Base36,