Thanx to Stalin, Anon. Nietzsche, Hank Purcell Jr.
An expansion of XP's On-Site Customer which describes the need to have on-site access to users that have the authority and ability to provide information pertaining to the system being built and to make pertinent and timely decisions regarding the requirements, and prioritization thereof.
AM expands XP's On-Site Customer practice to have project stakeholders -- including direct users, their management, senior management, operations staff, and support help desk staff -- actively involved in the project.
This includes making timely resourcing decisions by senior management, public and private support for the project by senior management, active participation of operations and support staff in the development of requirements and models pertaining to their respective areas.
You can easily promote active stakeholder participation on your projects if you adopt inclusive modeling techiques. When you Model With a Purpose you often find that you are modeling to understand something, that you are modeling to communicate your ideas to others, or you are seeking to develop a common vision on your project.
This is a group activity, one in which you want the input of several people working together effectively. You will often find that your development team needs to work together to create the core set of models critical to your project.
For example, to develop the Temporary working essay or architecture for you system, you will often need to model with a group of people to develop a solution everyone agrees on as well as one that is as simple as possible.
Most of the time the best way to do this is to talk the issue through with one or more people. Modeling with others is an example of "Non-Solo Development", as is pair programming. Apply The Right Artifact s.
Each artifact has its own specific applications. For example, a UML activity diagram is useful for describing a business process, whereas the static structure of your database is better represented by a physical data or persistence model. Very often a diagram is a better choice than source code -- If a picture is worth a thousand words then a model is often worth lines of code when applied in the right circumstances a term borrowed from Karl Wieger's Software Requirements because you can often explore design alternatives more effectively by drawing a couple diagrams on whiteboards with your peers than you can by sitting down and developing code samples.
The implication is that you need to know the strengths and weaknesses of each type of artifact so you know when and when not to use them. Note that this can be very difficult because you have Multiple Models available to you, in fact the Agile Models Distilled page lists over 35 types of models and it is by no means definitive.
Iterate To Another Artifact. When you are working on a development artifact -- such as a use case, CRC card, sequence diagram, or even source code -- and find that you are stuck then you should consider working on another artifact for the time being.
Each artifact has its strengths and weaknesses, each artifact is good for a certain type of job. Whenever you find you are having difficulties working on one artifact, perhaps you are working on a use case and find that you are struggling to describe the business logic, then that's a sign that you should iterate to another artifact.
For example, if you are working on an essential use case then you may want to consider changing focus to start working on an essential UI prototype, a CRC model, a business rule, a system use case, or a change case.
By iterating to another artifact you immediately become "unstuck" because you are making progress working on that other artifact. Furthermore, by changing your point of view you often discover that you address whatever it was that causing you to be stuck in the first place.
See the essay Iterate to Another Artifact for more thoughts. Prove It With Code.
A model is an abstraction, one that should accurately reflect an aspect of whatever you are building. But will it work? To determine so, you should prove your model with code. You've developed a sketch of an HTML page for accepting billing address information? Code it and show the resulting user interface to your users for feedback.
You've developed a UML sequence diagram representing the logic to implement a complex business rule? Write the testing code, the business code, and run the tests to ensure that you've gotten it right.
Never forget that with an iterative approach to software development, the norm for the vast majority of projects, that modeling is only one of many tasks that you will perform.
Do some modeling, do some coding, do some testing amongst other things. Use The Simplest Tools. The vast majority of models can be drawn on a whiteboardon paper or even the back of a napkin.
Whenever you want to save one of these diagrams you can take a picture of it with a digital camera, or even simply transcribe it onto paper. This works because most diagrams are throwaways; their true value comes from drawing them to think through an issue, and once the issue is resolved the diagram doesn't offer much value.
As a result a whiteboard and markers are often your best modeling tool alternative: Use a drawing tool to create diagrams to present to important project stakeholders and occasionally use a modeling tool if and only if they provide value to my programming efforts such as the generation of code.
Think of it like this: If you're creating simple models, often models that are throwaways because if you are modeling to understand you likely don't need to keep the model s around any more once you do understand the issue, then you likely don't need to apply a complex modeling tool.
Model In Small Increments. Incremental development in which you organize a larger effort into smaller portions that you release over time, hopefully in increments of several weeks or a month or two, increases your agility by enabling you to deliver software into the hands of your users faster.
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Introduction There are no precise, reliable statistics on the amount of computer crime and the economic loss to victims, partly because many of these crimes are apparently not detected by victims, many of these crimes are never reported to authorities, and partly because the losses are often difficult to .
Published: Mon, 5 Dec This assignment will critically analyse the concept of communication within nursing. A concept is said to be ‘a label given to an observed phenomenon’ (Bell, , P).