The document discusses software architecture, including:
1. Definitions of software architecture and how it is influenced.
2. Common sections of a software architecture document such as introduction, views, goals and quality.
3. Architectural patterns and views including model-view-controller, layered patterns, and the "4+1" views of logical, process, deployment, and implementation.
4. How architecture addresses concerns like complexity, communication, and early decisions.
Software engineering is a detailed study of engineering to the design, development and maintenance of software. Software engineering was introduced to address the issues of low-quality software projects.
Software Archtecture.
Software design is a process to transform user requirements into some suitable form, which helps the programmer in software coding and implementation.
Software design is the important step in SDLC (Software Design Life Cycle), which moves the concentration from problem domain to solution domain. It tries to specify how to fulfill the requirements mentioned in SRS.
Software design plays an important role in developing software: during software design, software engineers produce various models that form a kind of blueprint of the solution to be implemented
This ppt covers the following topics:
Introduction
Data design
Software architectural styles
Architectural design process
Assessing alternative architectural designs
Thus it covers Architectural Design
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Software engineering is a detailed study of engineering to the design, development and maintenance of software. Software engineering was introduced to address the issues of low-quality software projects.
Software Archtecture.
Software design is a process to transform user requirements into some suitable form, which helps the programmer in software coding and implementation.
Software design is the important step in SDLC (Software Design Life Cycle), which moves the concentration from problem domain to solution domain. It tries to specify how to fulfill the requirements mentioned in SRS.
Software design plays an important role in developing software: during software design, software engineers produce various models that form a kind of blueprint of the solution to be implemented
This ppt covers the following topics:
Introduction
Data design
Software architectural styles
Architectural design process
Assessing alternative architectural designs
Thus it covers Architectural Design
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
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Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Embracing GenAI - A Strategic ImperativePeter Windle
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2. Definition
The software architecture of a
program or computing system is the
structure or structures of the system,
which comprise software elements,
the externally visible properties of
those elements, and the relationships
among them.
5. Why is architecture important?
►Handling complexity
►Communication among stakeholders
►Early Design Decisions
►SA is a transferable, reusable model
6. Software Architecture Document
1. Introduction
2. Architectural Representation
3. Architectural Goals and Constraints
4. Use-Case View
5. Logical View
6. Process View
7. Deployment View
8. Implementation View
9. Data View (optional)
10. Size and Performance
11. Quality
7. Architectural Patterns : Definition
An architectural style or pattern is
a description of the component and connector
types involved in the style
the collection of rules that constrain and relate
them
8. Model-View-Controller
► Context
Provides a flexible structure for developing interactive applications.
► Problem
User interfaces are subject to changes. As new features are added
to the system, the UI must provide appropriate command and
menus to handle them.
Different platforms support different ‘look and feel’ standards; the
UI must be portable.
Different kind of users may expect different data format from the
UI (bar char, spreadsheet etc.).
► Solution
Divide the system into three parts: processing, output, and input:
Model: contains the processing and the data involved.
View: presents the output; each view provides specific
presentation of the same model.
Controller: captures user input (events-> mouse clicks, keyboard
input etc.). Each view is associated to a controller, which captures
user input.
9. Model-View-Controller
► Main goal:
facilitate and optimize the implementation of interactive systems,
particularly those that use multiple synchronized presentations of shared
information.
► Key idea:
separation between the data and its presentation, which is carried by
different objects.
► Controllers typically implement event-handling mechanisms that are executed
when corresponding events occur.
► Changes made to the model by the user via controllers are directly propagated
to corresponding views. The change propagation mechanism can be
implemented using the observer (design) pattern.
12. Layered Pattern
► Context
You are working with a large, complex system and you
want to manage complexity by decomposition.
► Problem
How do you structure an application to support such
operational requirements as maintainability, scalability,
extensibility, robustness, and security?
► Solutions
Compose the solution into a set of layers. Each layer
should be cohesive and at Roughly the same level of
abstraction. Each layer should be loosely coupled to the
layers underneath.
13. Layered Pattern
► Layering consists of a hierarchy of layers, each
providing service to the layer above it and
serving as client to the layer below.
► Interactions among layers are defined by suitable
communication protocols.
► Interactions among non-adjacent layers must be
kept to the minimum possible.
► Layering is different from composition
higher-layers do not encapsulate lower layers
lower layers do not encapsulate higher layers (even
though there is an existence dependency)
14. Three-Layered Pattern
► Context
You are building a business solution using layers to organize your
application.
► Problem
How do you organize your application to reuse business logic,
provide deployment flexibility and conserve valuable resource
connections?
► Solutions
Create three layers: presentation, business logic and data
access.
Locate all database-related code, including database clients access
and utility components, in the data access layer.
Eliminate dependencies between business layer components and
data access components.
Either eliminate the dependencies between the business layer and
the presentation layer or manage them using the Observer
pattern.
15.
16. Software Architecture Document
1. Introduction
2. Architectural Representation
3. Architectural Goals and Constraints
4. Use-Case View
5. Logical View
6. Process View
7. Deployment View
8. Implementation View
9. Data View (optional)
10. Size and Performance
11. Quality
17. Architectural Goals and Constraints
► The architecture will be formed by considering:
functional requirements, captured in the Use-Case
Model, and
non-functional requirements, quality att.
► However these are constraints imposed by the
environment in which the software must operate
that will shape the architecture :
need to reuse existing assets
imposition of various standards
need for compatibility with existing systems
18. Software Architecture Document
1. Introduction
2. Architectural Representation
3. Architectural Goals and Constraints
4. Use-Case View
5. Logical View
6. Process View
7. Deployment View
8. Implementation View
9. Data View (optional)
10. Size and Performance
11. Quality
19. Architectural Structures and Views
In construction, there are blueprints of
Plan , Different sides of construction , Electrical wiring , Plumbing,
…
Each of these views specifies a single entity (i.e. the
construction) from a different perspective (used by a
different person, for a different goal).
Similarly there are different structures and views in SA.
► View is a representation of software architecture based on
an structure as written by the architect and read by
stakeholders (an instance of the structure)
► SA is documented by a number of views.
21. Use-case View
► Contains only architecturally significant use cases
(whereas the final use case model contains all the
use cases).
The logical view is derived using the use cases identified
in the architectural view of the use case model.
► Architecturally significant use cases:
critical use cases, those that are most important to the
users of the system (from a functionality perspective)
use cases that carry the major risks
use cases that have the most important quality
requirements, such as performance, security, usability,
etc.
23. Logical View
► The Logical View is a subset of the Design Model
which presents architecturally significant design
elements
► describes the most important classes
► their organization in packages and subsystems
► organization of these packages and subsystems
into layers
► It also describes the most important use-case
realizations, for example, the dynamic aspects of
the architecture
27. Process View
►Consists of the processes and threads
that form the system’s concurrency and
synchronization mechanisms, as well as
their interactions
28. Deployment View
►This section describes one or more physical
network (hardware) configurations on which
the software is deployed and run.
29. Implementation View
► Describes the organization of static software
modules (source code, data files, executables,
documentation etc.) in the development
environment in terms of Packaging and
layering
► Are modeled using UML Component Diagrams.
► UML components are physical and replaceable
parts of a system that conform to and provide the
realization of a set of interfaces
30. Software Architecture Document
1. Introduction
2. Architectural Representation
3. Architectural Goals and Constraints
4. Use-Case View
5. Logical View
6. Process View
7. Deployment View
8. Implementation View
9. Data View (optional)
10. Size and Performance
11. Quality
31. Size and Performance
► The number of key elements the system will have to handle
(the number of concurrent online users for an airline
reservation system, …)
► The key performance measures of the system, such as
average response time for key events
Most of these qualities are captured as requirements; they
are presented here because they shape the architecture in
significant ways and warrant special focus. For each
requirement, discuss how the architecture supports this
requirement.
32. Quality
►Operating performance requirements, such
as mean-time between failure (MTBF).
►Quality targets, such as "no unscheduled
down-time"
►Extensibility targets, such as "the software
will be upgradeable while the system is
running".
►Portability targets, such as hardware
platforms, operating systems, languages