Design Considerations Architecture Example

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Design Considerations Architecture Example – Set of Slides to Accompany Software Engineering: A Practitioner’s Approach, 8/e by Roger S. Pressman and Bruce R. Maxim Slides copyright © 1996, 2001, 2005, 2009, 2014 by Roger S. Pressman For Use Only for non-profit educational use. reproduced ONLY for the use of college-level students when used in conjunction with Software Engineering: A Professional’s Approach, 8/e. Any other copying or use is prohibited without the express written permission of the author. All copyright information MUST appear if these slides are posted on a website for student use.

2 Why Architecture? The architecture is not the operating software. Rather, it is a representation that allows a software engineer to: (1) analyze the effectiveness of the design in meeting stated requirements, (2) consider architectural alternatives at a stage when creating design changes is easy, and ( 3) reduce the risks associated with building software.

Design Considerations Architecture Example

Software architecture representations are a facilitator for communication between all parties (stakeholders) interested in the development of a computer-based system. Architecture emphasizes early design decisions that have a significant impact on all software engineering work that follows and, just as importantly, on the ultimate success of the system as an operational entity. Architecture “contains a relatively small, intellectually understandable way of how the system is organized and how its components work together” [BAS03].

Top 9 Architecture Design Factors For All Architecture Projects

The IEEE Computer Society proposed the IEEE-Std, Recommended Practice for Architectural Description of Software-Intensive Systems, [IEE00] to establish a conceptual framework and vocabulary to be used during software architecture design, to provide detailed guidelines to represent an architectural description. , and promote good practices in architectural design. The IEEE standard defines an architecture description (AD) as a “collection of products for documenting an architecture.” The description itself is represented by multiple views, where each view is “a representation of an entire system from the perspective of a relevant set of [stakeholder] concerns.”

5 Architectural Genre Genre refers to a specific category within the general domain of software. Within each category, you will find many subcategories. For example, within the building genre, you’ll find the following general styles: houses, condos, apartment buildings, offices, industrial buildings, warehouses, etc. Within each general style, more specific styles can be used. Each style has a structure that can be described by a set of predictable patterns.

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Each style describes a category of system that consists of: (1) a set of components (eg, a database, computational modules) that perform a function required by a system, (2) a set of connectors that allow “the communication, coordination and cooperation”. between components, (3) constraints that define how the components can be combined to form the system, and (4) semantic models that allow a designer to understand the overall properties of a system by analyzing the known properties of the its component parts Data-centric architectures Data-flow architectures Call-and-return architectures Object-oriented architectures Layered architectures

Concurrency: Applications must manage multiple tasks in a way that mimics the process management parallelism of the task scheduler pattern operating system. Persistence: Data persists if it lives beyond the execution of the process that created it. Two patterns are common: a database management system pattern that applies the storage and retrieval capabilities of a DBMS to the application architecture an application-level persistence pattern that incorporates persistence features in application architecture Distribution: The way systems or components of systems communicate. each other in a distributed environment A broker acts as an “intermediary” between a client component and a server component.

Architecture Design Principles & Elements Of Building Design

The design must define the external entities (other systems, devices, people) with which the software interacts and the nature of the interaction A set of architectural archetypes must be identified An archetype is an abstraction (like a class) which represents an element of system behavior The designer determines the structure of the system by defining and refining the software components that implement each archetype

Economy: The best software is lightweight and relies on abstraction to reduce unnecessary detail. Visibility: Architectural decisions and their reasons should be clear to software engineers who review the model later. Spacing: separation of concerns in a design without introducing hidden dependencies. Symmetry: Architectural symmetry means that a system is consistent and balanced in its attributes. Emergence: Emergent, self-organized behavior and control.

Determine which elements of information are necessary for each decision. Explain the links between each decision and the applicable requirements. Provide mechanisms to change the situation when it is necessary to evaluate alternative decisions. Define the necessary relationships between decisions to support traceability. Link key decisions to architectural views resulting from those decisions. Document and communicate all decisions as they are made.

1. Collect scenarios. 2. Obtain requirements, limitations and description of the environment. 3. Describe the architectural styles/patterns chosen to meet the scenarios and requirements: • module view • process view • data flow view 4. Evaluate quality attributes considering each virtue on its own. 5. Identify the sensitivity of the quality attributes of different architectural attributes for a specific architectural style. 6. Critique the candidate architectures (created in step 3) using the sensitivity analysis created in step 5.

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Software Design Document Template

The overall complexity of a proposed architecture is assessed by considering the dependencies between components within the architecture [Zha98] Shared dependencies represent trust relationships between consumers using the same resource or producers producing for the same consumers. Flow dependencies represent trust relationships between producers and consumers of resources. Constrained dependencies represent restrictions on the relative flow of control of a set of activities.

21 ADL The Architectural Description Language (ADL) provides semantics and syntax for describing a software architecture Give the designer the ability to: decompose architectural components compose individual components into larger architectural blocks and represent interfaces (connection mechanisms) between components.

22 Architecture Reviews Assess the ability of the software architecture to meet system quality requirements and identify potential risks Have the potential to reduce project costs by identifying early design issues.

Identify and discuss quality attributes by going through use cases. Discuss a system architecture diagram in relation to its requirements. Identify the architectural patterns used and relate the structure of the system to the structure of the patterns. Use existing documentation and use cases to determine the impact of each pattern on quality attributes. Identify all quality issues raised by the architectural standards used in the design. Create a brief summary of issues discovered during the meeting and make revisions to the walking skeleton.

52 Design Considerations

To avoid rework, user stories are used to create and develop an architectural model (walking skeleton) before coding hybrid models that allow software architects to feed user stories into the evolving storyboard. the code that emerges from the sprint can be a useful form of architectural review

In order for this website to function, we record user data and share it with processors. To use this website, you must accept our Privacy Policy, including our cookie policy. This is the fourth post in a 5-part series describing How to Work as a Residential Architect. So far we have gone through How to get started; Understanding of services and rates; and The design process. Now is the time to make design decisions about the details of your home.

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After the architect and client have developed the best approach for the client’s home and have concluded the Schematic Design Phase, the project moves into the Design Development Phase. As the name suggests, this phase includes further development of the floor plan, elevation and section drawings with design details and decisions on finishes and fittings.  This phase will define and describe all the materials and systems in your new home.

One of my favorite design details for a home we recently completed in Upstate NY was the glass backsplash in the kitchen. With a little VISION, even something as simple as a kitchen backsplash can make a significant difference in your home.

7 Considerations When Creating A Lighting Plan For Your Home

As this house is situated on a steep slope, one side of the house is partially buried in the ground while the other side opens up to the views and forest beyond. The open-plan kitchen, dining and living areas keep the kitchen from feeling closed in, but one side “faces” the land.

We chose a backsplash of painted glass for the enclosed kitchen wall and designed concealed indirect lighting above it. These details create light from the lighting, giving an additional “open window feel” to this side of the house; and an exterior reflection and views, further enhancing the exterior focus.

Sustainability is not something that is applied to a design but should be an essential component from the start. For example, during the schematic design phase, site characteristics such as sun orientation, shade, wind direction, and local climate should inform the layout and facade of the house. The exploitation of these natural resources – “passive design” – is the most effective and cheapest way to achieve a more energy efficient home. An example of a “passive design” solution is

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