Travel Monkey
Saturday, August 15, 2009
Androgynous Collaboration
Monday, August 3, 2009
Anderson and Burnett Articles: Response
Monday, July 20, 2009
Team Revised Memo: Challenger Disaster
FROM: Krystal Miarecki, Heidi Pak
RE: URGENT: Avoiding Disaster on STS 51-L (Challenger Shuttle) Mission
In regards to STS 51-L (Challenger Shuttle), we have identified a design problem with the SRM O-rings that, if not addressed, could result in a fatal mission.
Solid Rocket Boosters (SRBs) are relatively new technology to us, as opposed to liquid-fueled systems. As the Challenger will be the first astronaut-manned mission using SRBs, we cannot take any risks.
The problem we have run across lies in the O-rings. At launch, the O-rings will lose their original shape due to motor pressurization. While it is in the nature of the O-rings to return to its original shape, we have found that there are milliseconds in between the transformation of the O-rings that determine system failure or success.
Furthermore, we have discovered that temperature affects the rate at which O-rings return to their original shape. After numerous tests, we found that field joint secondary seals lifted off metal surface under the following conditions: 1) at 75° F lost contact for 2.4 seconds; and 2) at 50° F lost contact without re-establishing. With our launch deadline set for January 27th, the temperatures have very little chance of being above 50 degrees.
When dealing with extremely sensitive materials that determine success or failure in milliseconds, it is unethical to gamble with the seven astronauts' lives and the reputations of our three organizations. Therefore, I urge the managers to consider postponing the launch date until further research is conducted and safe launching temperature has been reached.
As funding is tight and deadlines are crucial, a public statement must be released regarding the crucial need for more research into the technology behind the O-rings, as well as supporting statements as to why we are relying on SRB versus liquid-fueled systems.
Thank you for your attention and consideration.
Heidi and I approached our memos a little differently. Her memo provided an overview of facts and felt personal in nature. My memo was more technical in regards to details of the shuttle problem. Both memos were of an urgent nature. We combined the two memos, providing a good balance of technical details and personal touch; while keeping an urgent tone. I feel this was a good combination for our mixed audience of managers and engineers.
Friday, July 17, 2009
Challenger Memo
TO: Engineering and Managerial Services Distribution
National Air and Space Administration (NASA)
Marshall Space Flight Center
Morton Thiokol, Inc. (MTI)
FROM: Krystal Miarecki
DATE: July 16, 2009
RE: URGENT: SRM O-Ring Design Problem / Failure
ISSUE
After several evaluations of the Space Shuttle's Solid Rocket Boosters (SRB), engineers at MTI have discovered an issue with the O-Rings that if not addressed, could have fatal effects on the next space shuttle launch mission.
Facts:
• Primary "O" ring erosion (nozzle to case) has occurred in twelve (12) flights
• Primary "O" ring erosion (case to case) has occurred in five (5) flights; pressure build up on primary "O" ring causes secondary "O" ring to unseat
• Primary "O" ring sealing: FAILED
• During motor pressurization, field joint secondary seal lifted off metal surface (e.g. seal maintained contact at 100° F, lost contact for 2.4 seconds at 75° F and lost without re-establishing contact at 50° F)
• Secondary "O" ring sealing; FAILED at 50° F
Result of "O" ring failure:
Due to the joint erosion, the primary "O" ring fails during ignition. As a result, the secondary "O" ring may fail to serve its purpose as the redundant seal. Upon failure of a primary ring, the secondary ring may not pressurize and respond to the clevis opening rate, which means, there is no guarantee that the secondary seal would hold.
**FAILURE OF THE SRM "O" RINGS COULD RESULT IN A FATAL ACCIDENT AND LOSS OF HUMAN LIVES.**
RECOMMENDATION
Taking into consideration the time of the year and low temperatures, I feel we should not risk using the current "O" ring seals on the shuttle. It is my recommendation that the space shuttle mission scheduled for January 27, 1986 be delayed until further noticed.
In the meantime, I feel we should develop a special project team consisting of engineers and managers from NASA, MTI and Marshall dedicated to the "O" ring issue and meet weekly via conference call to discuss the project status. Furthermore, any interim correspondence should be sent via email and include all project team members.
Thank you for your attention to this matter.
Friday, July 10, 2009
Bill Finch Recommendation Letter
Thursday, July 2, 2009
Recommendation Letter for Bill Finch
Robert Hansen
District-Level Supervisor, Network Design
RE: Second-line Engineer Position
Dear Robert,
I am responding to your inquiry considering Bill Finch for the second-line engineer position. Currently, Bill is a customer services supervisor with a background as a first-line foreman. My experience working with Bill on our community improvement group has been positive. He’s a very active and dedicated community volunteer, serving in the Lions Club and on the YMCA Board of Directors.
With regards to Bill’s work ethic, he's known to be a team player and runs the best crew on site; consistently meeting objectives by a substantial margin. Bill’s personnel evaluation (10 months ago) points out his ability to retain good expense control and effectively meet safety objectives. For example, just last month, Bill was a key contributor at our family safety night event.
Although Bill has a great work ethic, his strong personality can challenge his ability to communicate effectively with co-workers. I don’t see this as a problem but rather a development opportunity. The business relationship coaching class offered in human resources would benefit Bill and help fine tune his skills. On a personal note, I feel it’s important to point out that Bill is also dealing with a difficult personal issue. His lovely wife Eloise has cancer and the prognosis is not good. However, even with the additional stress, Bill continues to produce exceptional team results.
With that said, I would recommend Bill Finch for the second-line engineer position. This would be a great opportunity for Bill and your group would acquire a dedicated, hard working engineer.
If you have any further questions, please feel free to give me a call, (860) 225-5252.
Sincerely,
Krystal Miarecki
Wednesday, June 24, 2009
Locker Article: Success v. Failures
Now that I work in a corporate law department it is interesting to watch the transition legal staff makes from private sector to corporate. Corporate culture is very different from private practice or a government agency. In corporations people collaborate all the time, or they at least try to. Locker discusses the success Group 2 had in their collaboration to include: flexibility, equal team contributions, genuinely cared for each other, good communication, planned and executed together, tasks and writing were defined and carried out broadly (legal / non-legal intentions), informed/educated the audience throught their writing, viewed revision process as a means to improve document and they were acclimated in their oranizational culture. Group 2 had a stellar team. While collaboration occurs regularly in corporations, I find it very challenging because you work with such a large group of people. These individuals are different via their cultures, methods of learning, work experience and the way in which they social interact with one another. I found that to have successful collaboration it helps if you know and understand who you are working with. In my work environment a problem I see is in communication with one another on issues outside of their own specialized areas. Working on a project, I will seldom get emails/correspondence that do not speak to the project group audience but rather to an individual area. People seem to struggle with broadening information to make the email/correspondence understandable and useful to all.
In regards to classroom collaboration, the difference I see is between standard full-time students and the adult learners. I have not had negative collaborations at the university but I have had better collaborations, usually with adult learners. I think that is to be expected considering the additional work and life experience they have. Most of them have learned to collaborate fairly efficiently at this point in life.