What is DCD·UCD?

DCD(Dynamic Content Delivery) is a service capability specification of OMA, which can push the content directly to the user terminal. In the business of China Mobile, it is called "Express", but not many people know it. System introduction DCD system includes three parts: DCD server, DCD client software and content source. The read content is submitted from CP to DCD server, and then there may be two ways: 1. The DCD server sends a Push message to the client to inform the client to update the latest content immediately. 2. The 2.DCD server waits for the HTTP request from the client to synchronize regularly, and extracts the latest content.

Note: The current DCD service is a closed system, which does not reflect the independent role of CP, nor does it develop a certain number of CPS to provide content. Therefore, the content that DCD can subscribe to is relatively simple, and the content is not very attractive. Personally, I think this is one of the main problems that need to be solved in DCD business at present. Let's analyze the commercial characteristics of DCD and briefly talk about my own ideas. The push and pre-download of content are similar to SMS, MMS and WAP push services, and DCD realizes the push and distribution of content. Different from WAP web browsing, users don't need to remember URL addresses, there is no waiting time for web page transmission, and there is no link click. Everything is reflected in the automatic acquisition and storage of data in the background. Client software DCD needs specially developed client software to automatically download, store, display and delete content. According to the DCD service specification of China Mobile, there is a special content display area on the standby screen or desktop. This is also the great advantage and uniqueness of DCD service which is different from other services. Compared with MMS, DCD service is very similar to MMS in system composition, but it has many enhanced functions. Listed as follows: MMS DCD

1 Timely support of information acceptance through push message. At the same time, it supports timed content synchronization and user manual content synchronization.

2 content pre-download. Before presenting the content to the user, the program downloads the content in the background. Use MIME to encapsulate all content into a content body, and use SMIL to support playback control. Support. Use XML or XHTML to describe pictures, multimedia and other content. Each content is downloaded separately.

3 business scalability is not strong, business scalability is strong, and the interface definition based on XML has strong business description ability.

The user is responsible for the management of downloaded content, and the content management similar to SMS is completed by the client, which has little interference to the user.

5. Almost all the necessary functions of mobile phones are supported, and the installation rate of client software is far less popular than MMS.

In terms of business characteristics, DCD function is similar to the upgrade of MMS function, but it cannot replace MMS because of its unique business. Comparison with Internet standard RSS OMA refers to the Internet standard RSS/ATOM when defining the DCD capability specification, because its services are essentially similar. But there are many differences, mainly to solve the special performance problems and network problems on the mobile phone terminal. 1. Considering the bandwidth limitation, optimize the amount of data transmitted each time. 2. Support subscription management of multiple channels. Optimize and reduce the number of synchronizations, and send all the source information of different channels subscribed by users at one time. There are also such services on the Internet, such as Google Reader and Yahoo Pipes, which are used to merge RSS feeds that users need. 3. Enforce client content management to avoid excessive accumulation of downloaded and stored content affecting the normal operation of the system. 4. Provide enhanced functions according to the user information and location information provided by the client. Distinguish users and send information related to geographical location. 5. Push message support can achieve better timeliness than RSS. 6. The service and interface are defined to facilitate the implementation of the client. In essence, DCD embodies the concepts of RSS and AJAX that have been proved to be very effective on the Internet: subscription and synchronization, and background transmission of XML data. No matter how it is realized, the business features have strong Internet characteristics. When it comes to the characteristics of the Internet, we have to mention the profit model of the Internet: the advertising model. DCD service has the ability to carry advertising content. Mainly reflected in the following aspects: 1. Combined with the interesting content subscribed by users, it is easy to be concerned. 2. Appropriate content presentation ability enriches the content. 3. The content can be clicked, and the advertising effect can be accurately calculated. 4. The content is displayed quietly, and automatically deleted after expiration, with little interference to users. 5. New applications, users are not easily disgusted. 6. Users can be accurately distinguished, and location information can be provided to improve the accuracy of advertising. These are different from the previous short message advertisements and have unique advantages. Therefore, if the DCD business is promoted smoothly and the actual number of users is large enough, adding high-quality advertisements will probably be a good profit point. One advantage of Internet companies lies in the continuous tracking and optimization of products. Service updates are frequent and continuous, with a small amount of upgrades at a time, and are adjusted at any time according to user feedback. So that the product is very suitable for the needs of users. However, the product demand and form of DCD are relatively clear, and the demand for continuous upgrading is not obvious. Therefore, the traditional product model developed and operated by China Mobile relatively independently can also ensure the smooth implementation of DCD products.

UCD (User-centered Design) refers to user-centered design. It is a design mode that takes user experience as the design decision center and emphasizes user priority in the design process.

explain

Simply put, it is to design, develop and maintain products based on users' needs and feelings, rather than let users adapt to products. No matter from the product use process, product information architecture, human-computer interaction mode and so on. The design with UCD as the core always pays attention to and considers the user's usage habits, expected interaction mode, visual experience and other aspects.

Edit this measurement dimension

A good user-centered product design can be measured by the following dimensions: the effect, efficiency and subjective satisfaction of the product when it is used by a specific user for a specific purpose in a specific use environment, and by extension, it also includes the degree of product learning, the degree of attraction to users, and the overall psychological feelings of users before and after experiencing the product.

Edit the meaning of this paragraph.

1. The source of a product may have many conditions, such as user demand, enterprise interests, market demand, or it may be driven by technological development. In essence, these different sources are not contradictory. A good product, first of all, is the combination of user needs and enterprise interests (or market demand), and secondly, the development cost is low, both of which may lead to the demand of technological development. A) The more we can fully understand the needs of target users in the early design stage of products and combine them with the market demand, the more we can reduce the cost of product maintenance and even rework in the later stage. "If we convey the feeling of' we care about them' to users in the product, users' acceptance of the product will increase", and at the same time, we can tolerate the defects of the product to a greater extent. This feeling is not limited to a certain package or a certain interface carrier of the product, but runs through the overall design concept of the product, which requires us to take the user as the center from the initial stage of design. B) Design based on users' needs often helps to design "future products". "A good experience should come from the needs of users, and at the same time exceed the needs of users". This is also conducive to our overall planning of the series of products. 2. With more and more similar products available to users, users will pay more attention to their time cost, learning cost and emotional feelings when using these products. A) Time cost, in short, is the time that users need to spend in operating a product. No user will be willing to spend time on a product that only realizes functions for himself. If our products can't convey any positive emotional feelings, it is the most basic user value to let users complete the required functions quickly. B) Learning cost, mainly for novice users, which is especially critical for network products. There are many similar products, and they are easy to get at the same time, so for novice users, they still don't know the detailed value between different products. A key point that affects their choice of a product is which product can make them get started easily. Statistics show that if novice users spend a lot of time and energy on learning and exploration for the first time, or even fail to use it for the first time, the probability of giving up the product is very high, even if it sometimes means that they need to give up the material benefits behind the product at the same time, users will not care. C) Emotional feelings, generally speaking, this is based on the previous two points, but in reality, there is also such a situation: a product brings users wonderful emotional feelings, so that they are willing to take the time to learn this product, even in some special products, users pay more attention to emotional feelings than anything else. For example, in some products, users have high requirements for product safety. At this time, this product may need to increase the steps and time of user operation, giving users the feeling that "this product is very safe and cautious". At this time, reducing the user's operation time and allowing the user to complete the operation quickly will make the user feel unreliable.

Edit this UCD record

1. requirement analysis: (business process) purpose: to provide user analysis according to product requirements and design requirements. Methods: Interview, focus group, refining target user role model, scenario analysis, competitor analysis and refining qualitative and quantitative related data. Conclusion Report: According to the analysis of the use characteristics, emotions, habits, psychology and needs of the target users, the user research report and usability design suggestions are put forward. Collaborators: marketers, customers who need products, and project leaders. 2. Prototype design: (information architecture+interaction design) Objective: Conceptual scheme design. Formulate business functions and interface specifications of products. Methods: Cooperate with the development team to design various interactive prototypes. Communicate with business experts and marketing department to confirm the design and get approval. Conduct role model design and scene design. Through the reproduction and demonstration of the scene, summarize and gradually refine the various interactive needs of users, put forward the design scheme, and complete the demonstration, discussion, improvement and finalization of the design scheme. Conclusion Report: Make a prototype of interaction design. Provide design standards and specifications for user interface and interactive design implementation. Collaborators: project leader, development team and marketing personnel 3. Visual management: goal: to make the interface design more in line with product positioning, user habits and standardized layout, and guide the realization of functions correctly and effectively. Methods: Presided over the user survey and visualized the guidance interface. Design window specifications and graphic layout. Conclusion report: Interface test report. = = "Output visual design specification Collaborator: visual designer 4. Usability test: Purpose: Through observation, find out what problems have occurred in the process, what functions and operation methods users like or dislike, and why. Methods: One-to-one user test conclusion report: user background document, user agreement, test script, pre-test questionnaire, post-test questionnaire, task card, process record document and test report. Partners: test volunteers, market related personnel 5. Follow-up survey: Objective: To give feedback on the results of product use. Methods: User interview and user feedback conclusion report: According to the feedback and actual investigation, the product feedback result report was written according to the expected purpose. Including worthy design and modification suggestions. Collaborators: product users and market-related personnel.