Compare and Contrast Systems Development Life Cycle (SDLC) Models

Introduction
SDLC is a conceptual model integrated into the system development process that consists of a series of phases to plan, analyze, design, implement and support an information system.

Seven-Step SDLC Model
Planning
Planning is the first phase of the seven-step SDLC model and is essential in determining the necessity of a proposed system so as to achieve efficiently and effectively the organization’s strategic goals. Planning phase entails of determining the project scope and the IT specialists and analysts define the location for the execution of the system functions. (Ahituv, Neumann & Zviran 2002)

System analysis
System analysis involves the IT specialists and analysts, and the end-users to work together to identify the need for change or the source of the problem. (Babers, 2015) The development team that got identified in the planning phase works together with the system users in modeling and the definition of the business process in detail.

Design
This phase involves the determination of the information requirements of the new system. (Shim, 2000) Simply the description of the necessary features, specifications, and operations of the new system get done in detail.

Development
The development phase involves the transformation of the design documents into the actual system. (Ruparelia 2010) System designers build and program information technologies and information system projects at this stage.

Testing
The purpose of integration and systems testing is to determine whether the new system meets the set of business objectives set out in the planning phase and to check for bugs, errors, and interoperability. The typical approach to testing of the design is to move from an individual element to the view of the entire system. (Norton, & McGraw-Hill, 2002)

Implementation
The implementation phase entails of the distribution of the new system to all the organization’s personnel and installation in the various departments. After installation in the departments, the workers get training on the operation of the new system. (Crnkovic, & Larsson, 2002) They also receive documentation such as system manuals and user guide to instruct them on the use of the system.

Operation and Maintenance

The final phase of the seven-step SDLC model involves the evaluation and maintenance of the new system. During the systems support and security phase, the IT staff is responsible for the maintenance, improvement, and protection of the new system. Maintenance involves correction of errors and adaptation to the changes of the environment. Improvement involves the alterations to provide new features and benefits while protection includes the safeguarding the new system from internal and external threats. (Shelly, & Rosenblatt, 2011)

Four-step SDLC Model
Definition Phase
The definition phase is the initial phase of the four-step model and consists of preliminary analysis, feasibility study, information analysis, and system design. The preliminary analysis gets used to determine the problem that requires a new system or system modification in an organization. The feasibility study also determines the necessity of the project and draws a preliminary plan on how it should proceed if justified. The information analysis consists of an analysis of the present system, the determination of the information requirements and the conceptual design of the proposed system. The system design entails of developing a program and procedure specifications that would get used by IT specialists and developers of the proposed system.

Construction Phase
The construction phase comprises of the programming, procedure and development. (Ruparelia, 2010) The programming activity involves the coding and testing of the computer programs on the computer system. The procedure and development include writing and the testing of procedures for various users and operators. The programming results in computer instructions whereas the procedure and development results in instructions meant to guide the people involved in the proposed system.

Implementation Phase
The third phase is the implementation phase that involves conversion in Information systems technologies. The implementation phase involves the training of the workers that will operate and use the new system, breaking the system in, and finally acceptance testing by the end-user. (Li, 1990)

Operation and Testing Phase

The last step of the four-step model comprises of operation and maintenance, post audit, and termination. The new system at this stage operates as a production facility, processing and producing information, and at the same time undergoing maintenance. Throughout the functioning of the system, periodic post audit review forms control points. The purpose of the reviews is to indicate when the operation cycle of the current system approaches the end, and a new cycle life get indicated. The current system gets terminated when its operation in the organization is not worthwhile. (Ahituv, Neumann & Zviran 2002)

Compare and Contrast the seven-step and four-step SDLC Models
The seven-step and four-step models are systematic processes used in system development by organizations and businesses. They also have closely related processes though with different activities at each phase. Both processes are used to produce new systems that assist in corporate transactions, the connection of businesses and office data, and also support users in the architecture of strategy. The life cycle of the two models starts at initiation and ends after termination. (Isaias & Issa 2015) However, there are several differences between the two SDLC models. The seven-step model is highly preferable and produces high-quality systems because it entails of more stages that allow the solving of complex problems, end-user involvement, and flexibility. Unlike the four-step SDLC model, the seven-step SDLC model consumes more time and resources in building, implementation, and construction of information systems. The suitability of the seven-step SDLC model is handling complex problems that require more concentration. The four-step SDLC model gets suited for the less complex issues that get needed in a short period.

Waste Water and Sewage

Executive Summary
The ICS project provides the solution to the Waste, Water and the Sewage systems through the provision of remote and local control of the movement of the turbulence of the liquid and aqueous solutions. The ICS system incorporates the combination of different integrated systems that control pressure regulates the speed as well as controlling the gate valves in water catchment areas. The ICS system implements the SCADA technology to take the digital management and control of the wastewater and the sewage. The SCADA technology applies the sensor approach methodology whereby the sensor mechanism gets involved in managing and controlling the intake and the pumps used at the various points in the industrial system. The gadgets controlled include the water pumps the distributors and the purifying centers. The SCADA automates the process of the water supply to enhance proportional distribution of water in industries, factories, urban centers, rural areas, the domestic utilization and the agricultural operations like irrigation. The ICS-SCADA system gets applied in the Waste and Sewage system control and disposal. The SCADA systems monitor the discrete data and information concerning the entry of the waste material within the conduit pipes. The applications of the SCADA in the ICS include the pressure hydraulic pumps utilized in the boreholes gas and oil distributing industries.

ICS Industry Architecture Being Designed
The ICS system shall incorporate the utilization of the hardware and the software integration of materials and components. The structure and the design of the ICS-SCADA system shall include the user interface architectural design, the backend and the front end operation interface. The ICS-SCADA systems architecture incorporates the relational and the non-relational database design. The design of the ICS-SCADA control and management structure shall implement the three tires and the two tire client-server based systems to ensure multiple computer-based operations. The system hardware and software components include the dedicated Remote Terminal Units (RTU) and the Radio Telemetry Units for running and controlling the control algorithms for the flow control (Brodsky, & Radvanovsky, 2011). The architecture also incorporates the input and the output systems for the displaying of the graphics, charts and diagrams for the monitored and analyzed values. The video display monitors and the telnet oriented video conferencing system shall get embedded in different terminals to enhance the remote and local troubleshooting and diagnosing of the entire system. The ICS-SCADA system shall incorporate the electromagnetic field sensors for the detection of flaws and dangers imposed within the system to relay the alarms and notifications to end users. The system architecture shall incorporate the installation of the storage devices interlinked with the data and information repository backup systems. The storage system shall implement the VMware cloud computing system to facilitate the storage of data and information for the future decision making. The ICS-SCADA system architecture shall take into consideration the installation and embedding of the artificial intelligent systems to enhance big data analysis as well as data mining and data warehousing for the waste, water, and the sewage control.

1. Overview

The SCADA project shall implement the Redundant Fiber Optic and the Ethernet network. The system shall use the Node system of linking the World Wide Web interface. The proposed SCADA system within the Waste, Water and the Sewage system shall involve the replacement of the Unix SCADA systems with the improved redundant SCADA systems. The project team shall design a comprehensive system that incorporates the mesh network topology. The network topology shall link over 5000 data points using the SCADA System and connect the complete installation and integration of the control systems (Brodsky, & Radvanovsky, 2011).

2. Statement of Need
The government and the water treatment center shall provide the solution to the general public industries and the agricultural sectors through the installation of the water treatment points and plants in different stages. The current problem of impure water requires the application of the sewers and the pump stations in the water treatment and catchment areas. The solution on the waste dumping and flow require the installation of the waste and water treatment plant at various points of water flow. The sewage control and management problem require the implementation of the ICS-SCADA sludge treatment plant in the urban and the industrial areas (Pramod, et al…, 2013). The various treatment points require monitoring of flow turbulence to regulate the speed and pressure of the materials on the transit network.

3. Detailed Description
The ICS-SCADA system shall incorporate the operational interfaces that gather and conduct the entire system control at the various routes and the section of the interface. The operational strategies shall incorporate the implementation of the SCADA Human Machine Interface (HMI) (Dzung, et al…, 2005). The system shall get embedded to the network terminals and the links to facilitate easier reading and interpretation of data and information. The system shall apply the simplified user capabilities over the entire system that guarantee operational and implementation friendly.

ICS Network Architecture
The main physical and logical devices implemented in the ICS-SCADA system involve the processors, the controllers, and the RTU’s. The entire system shall incorporate the connection of the devices via the neutral fiber optic and the Ethernet network. The processing unit shall manage and control the input and the output materials within the SCADA systems. The controllers shall include the Programmable Logic Control (PLC) responsible for automation of observing and analyzing of data and information (IEEE Guide for the Commissioning of Electrical Systems in Hydroelectric Power Plants, 1998). PLC allows easy programming of different applications. The Physical Control Systems (PCS) controls the movement of materials by regulating the speed and pressure. The Remote Terminal Units (RTU’s) have the responsibility for facilitating synchronization between pumps and the sensor mechanisms. The RTU’s adjusts the data and information according to the analysis within the system.

Understand Legal and Ethical Issues of Assisted Suicide

1. Discuss the legal rules and regulations on assisted suicide: one state legalizes the assisted suicide, and the other state does not.

In the United States, Oregon and Washington have legalized physician-assisted suicide. This law established by states provides citizens in the state with a right to assisted suicide commonly known as ‘death with dignity.’ In these states, physicians are empowered to aid patients to end their life and have been provided with a legal excuse to a charge of assisted suicide. The law in these states gives specific conditions when and under what circumstances a patient can be allowed to get assistance to end their life. Some of the requirements include that the patient is expected to die within a specified period and that the procedure must follow certain consent guidelines.

In states where there is no law legalizing physician-assisted suicide, an individual or a physician is guilty of promoting suicide attempt when they intentional leads to or assists another person attempt suicide.

2. Discuss the legal issues on assisted suicide (e.g., 2nd-degree murder).

The legal issues arising from physician-assisted suicide is that doctors can be charged with second-degree murder as they would be killing or aiding in the death of a patient intentionally. The legal perspective of homicide is described by the act of bringing about their death or assisting in ending their life, which is the act of assisted suicide. In care facilities, a legal issue arises when a doctor whose responsibility is to do good, aids in the death of a patient who requests assistance to commit suicide. The doctor may be charged and found guilty of assisting another person to commit suicide.

3. Discuss the ethical issues of assisted suicide (e.g., right to die).

Various ethical issues arising from traditions of nursing and medicine have led to opposition of assisted suicide by nursing and medical organizations. The patient’s in care facilities have a right to know their prognosis to make decisions concerning the implementation of life-prolonging treatment. Although patients have a right to make a decision about what they want, the ethical issue that arises is whether they are mentally competent and can make properly informed end of life decisions about their condition. Also, an ethical issue that arises from a patient who has a right to die and seeking to end their life since they are suffering is whether the suffering should be viewed according to the patient’s view or considered in other people’s perspective. An ethical issue on assisted suicide on an individual who has a right to die is whether the approach used is widely acceptable.

4. Shall the person (i.e., a family member) be charged a crime (e.g., murder), who has provided any kind of assistance to another person’s suicide?

A family member who provides any kind of assistance to another individual so as to assist end their life is guilty and may be charged with a crime of manslaughter. The crime is that the person purposely aids another commit suicide regardless of whether the patient was willing or made own decision to end their life. The kind of assistance may include giving advice on how to end life, giving a book that provides guidelines on suicide or even providing pills or medicine or other physical means that causes death.

5. Your feedback and solutions to the issues of assisted suicide, legal and ethical

The subject of assisted suicide whether by a family member or an organization or a physician raises sharp contrasting opinions. Individuals commit or have thoughts of committing suicide for various reasons that range from ending the suffering caused by terminal illnesses or other problems. Governments and states should formulate and enforce laws that prohibit assisted suicide without proper guidelines or advice. The individuals seeking advice on assisted suicide or those who want to commit suicide should have adequate knowledge of the outcome of their actions. Federal and state government should also increase assistance to patients who are suffering or have pain due to some illness.