欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PDF文档下载
    分享到微信 分享到微博 分享到QQ空间

    REG NASA-LLIS-2216-2009 Lessons Learned - Ban Nonessential Infrastructure Support Services That Could Disrupt Critical Mission Operations.pdf

    • 资源ID:1019366       资源大小:15.91KB        全文页数:3页
    • 资源格式: PDF        下载积分:10000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要10000积分(如需开发票,请勿充值!)
    邮箱/手机:
    温馨提示:
    如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    支付方式: 支付宝扫码支付    微信扫码支付   
    验证码:   换一换

    加入VIP,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。

    REG NASA-LLIS-2216-2009 Lessons Learned - Ban Nonessential Infrastructure Support Services That Could Disrupt Critical Mission Operations.pdf

    1、Lessons Learned Entry: 2216Lesson Info:a71 Lesson Number: 2216a71 Lesson Date: 2009-08-18a71 Submitting Organization: JPLa71 Submitted by: David Oberhettingera71 POC Name: Joseph Guinn; Ronald D. Sharpa71 POC Email: Joseph.R.Guinnjpl.nasa.gov; Ronald.D.Sharp-104583jpl.nasa.gova71 POC Phone: 818-354-

    2、0425 (Guinn); 818-393-7919 (Sharp)Subject: Ban Nonessential Infrastructure Support Services That Could Disrupt Critical Mission Operations Abstract: Contractors arrived at the Phoenix Navigation Mission Support Area during a mission-critical Mars Phoenix project event, and they continued to perform

    3、disruptive repairs to a badge reader despite a declared facility freeze. Establish and maintain institutional procedures for coordination of nonessential infrastructure services with scheduled configuration control freezes instituted at the request of flight projects during critical mission operatio

    4、ns.Description of Driving Event: Eight days before the May 2008 arrival of Mars Phoenix Lander at the north polar region of Mars, the Phoenix Project at the NASA/Caltech Jet Propulsion Laboratory (JPL) was preparing a final trajectory correction maneuver (TCM-5) to guide the spacecraft on its naviga

    5、ted course. A final TCM is a mission-critical event in which an error, or non-performance of the maneuver, can result in mission loss (Reference (1). Due to the criticality of this spacecraft command sequence and the limited time available to prepare it, the Phoenix Mission Manager imposed a Level 2

    6、 facility freeze for the Phoenix Navigation Mission Support Area (MSA) on the 6th floor of Building 264. A Level 1 configuration control freeze is requested by a flight project, and it restricts changes to the configuration of multiple JPL facilities during a critical event. In contrast, the restric

    7、tions associated with a Level 2 freeze are limited to a specific facility or service. The project notifies a facility manager of the Level 2 freeze, and a printed tag is placed at the facility entrance. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,

    8、-Access to the MSA is restricted by an electronic badge reader that operates the door lock. An upgrade to the badge reader system in Building 264 was scheduled for May 2008, which happened to be on a Saturday during the Level 2 freeze for TCM-5 sequence development (Reference (2). Contractors arrive

    9、d during the freeze, and started work on the reader even though the Phoenix Mission Manager explained that there was a critical event in progress. The upgrade work involved removal of ceiling tiles directly above the MSA and work in the crawl space without regard for the computer equipment directly

    10、below. No drop cloths were placed over the sensitive computer equipment being used to prepare the TCM, and the contractor intrusion disrupted the work of the navigation team. A phone call to JPL Security halted the badge reader work for the day, with the badge readers restored to the previous config

    11、uration. The JPL practice is for infrastructure organizations such as JPL computer and network services to consult the Interplanetary Network Directorate (IND) Critical Activities Schedule and defer planned activities in accordance with any scheduled freezes (Reference (3). IND also holds a weekly p

    12、lanning meeting to discuss scheduled freezes and other concurrent activities. However, it is the JPL facilities and infrastructure services that have the responsibility to consult these resources to ensure that their plans do not conflict with critical project activities. References: 1. “Inadequate

    13、MCO Contingency Maneuver Planning,“ NASA Lesson Learned No. 0916, NASA Engineering Network, May 4, 2000. http:/www.nasa.gov/offices/oce/llis/imported_content/lesson_0916.html2. “Badge Readers Being Changed On The 6th Floor During Level 2 Freeze,“ JPL Incident Surprise Anomaly (ISA) No. Z92597, May 1

    14、7, 2008.3. IND Critical Activities Schedule, http:/dsnprocess.jpl.nasa.gov/icas/Lesson(s) Learned: Although flight projects are careful to assess risks to mission operations such as unplanned facility power interruptions, the impact on flight operations of scheduled facility services like visitor to

    15、urs, janitorial service, and facility and equipment maintenance may not be as obvious. Had JPL Security known that a facility freeze was in effect, critical Phoenix project activities in preparation for the Mars landing would not have been disrupted by this infrastructure service.Recommendation(s):

    16、Establish and implement institutional procedures for coordination of nonessential infrastructure services with scheduled configuration control freezes that have been instituted at the request of flight projects during critical mission operations.Evidence of Recurrence Control Effectiveness: Provided

    17、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-JPL has referenced this lesson learned as additional rationale and guidance supporting Paragraph 6.3.2.3 (“Engineering Practices: Mission Operations - Process and Procedure“) in the Jet Propulsion Laboratory st

    18、andard “Flight Project Practices, Rev. 7,“ JPL DocID 58032, September 30, 2008.Documents Related to Lesson: N/AMission Directorate(s): a71 Space OperationsAdditional Key Phrase(s): a71 0.a71 0.a71 0.a71 0a71 1.Facilitiesa71 1.Maintenancea71 1.Configuration Change Controla71 1.Logistics and maintenan

    19、cea71 1.Ground support systemsa71 0a71 0.a71 1.Flight OperationsAdditional Info: a71 Project: Mars PhoenixApproval Info: a71 Approval Date: 2010-01-15a71 Approval Name: mbella71 Approval Organization: HQProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-


    注意事项

    本文(REG NASA-LLIS-2216-2009 Lessons Learned - Ban Nonessential Infrastructure Support Services That Could Disrupt Critical Mission Operations.pdf)为本站会员(周芸)主动上传,麦多课文档分享仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1 

    收起
    展开