The model is composed of the system development cycle and the system maintenance cycle 此模式包含了系統(tǒng)發(fā)展周期及系統(tǒng)維修周期。
If use it , the information system development cycle can be shortened , and information system can be recycled 組件式開發(fā)可以縮短信息系統(tǒng)的開發(fā)周期,可以實(shí)現(xiàn)信息系統(tǒng)的重復(fù)利用。
Student teams will work a case study through the full information system development cycle using project management and modelling tools 學(xué)生以小組形式使用項(xiàng)目管理和模型工具完成一個(gè)完整信息系統(tǒng)的開發(fā)。
The measure should be meaningful to the end - user or purchaser of the system , and could be easily extracted early on in the system development cycle 量度的資料須對(duì)終端用戶或系統(tǒng)購(gòu)買者具有意義,并可以在系統(tǒng)發(fā)展周期的初期輕易計(jì)算出來(lái)。
The system development cycle covers a number of phases starting from project request , feasibility study , systems analysis and design , implementation and post implementation review 系統(tǒng)發(fā)展周期由數(shù)個(gè)階段所組成,包括最初之計(jì)劃要求,其后之可行性研究,系統(tǒng)分析及設(shè)計(jì),推行,及最后之計(jì)劃推行后的覆檢。
Therefore , the transplant conditional access system development cycle plays the decisive role to the overall system development cycle , this article studies on a new method of transplant access system to add a new software adapter level during the process of transplant , the main work includes : after analyzed the principle of work and process of conditional accessing system , transplants the various conditional accessing system to the digital television receiving system , analyzed the compiled code required for the process of transplant , combine the principle of work and process of conditional accessing system , be aimed at transplanting conditional accessing system can only allow single conditional accessing system work normally 所以開發(fā)數(shù)字電視接收系統(tǒng),需要針對(duì)地區(qū)移植不同的條件接收系統(tǒng),這樣移植條件接收系統(tǒng)的開發(fā)周期對(duì)于整個(gè)系統(tǒng)的開發(fā)周期起到?jīng)Q定性作用。本課題研究了一種新的移植條件接收系統(tǒng)的方法即在移植時(shí)添加一個(gè)新的軟件適配層,主要的工作包括:分析條件接收系統(tǒng)的工作原理和過程;通過移植幾種不同的條件接收系統(tǒng)到數(shù)字電視接收系統(tǒng)中,分析移植過程需要編寫的代碼;結(jié)合條件接收系統(tǒng)的工作原理和過程,針對(duì)以往移植條件接收系統(tǒng)只能使一個(gè)條件接收系統(tǒng)正常工作的移植方法。