Monday 17 October 2016

Technical Proposal Project: Problem and Purpose Statement



Problem statement: Water tanks in Singapore are compartmentalised, and each building has a single tank which has internal partitions to ensure constant water supply to buildings even during cleaning and maintenance. However, building occupants experience temporary water disruptions as compartmentalisation problems create water leakages, resulting in having the entire tank being shut off in order to carry out works. Therefore, instead of having multiple compartments in a single tank, multiple tanks are needed to supply water reliably.

Purpose statement: The aim of this report is to propose to the Housing Development Board (HDB) the implementation of two water tanks connected in parallel to supply water to each building, so as to eliminate the use of unreliable compartments while maintaining redundancy. This will reduce the occurrence of water disruptions and improve the reliability of water supply.

Summary & reader response - article LTA, Draft 3



In the article “TRAINS ON THE NORTH-SOUTH AND EAST-WEST LINES SAFE FOR SERVICE”, the Land Transport Authority (LTA, 2016) wrote that despite undergoing rectification works, the trains that have been in the media spotlight are safe for service.
According to LTA, all new trains are tested before they are put into service. For defective trains, immediate action was taken to prevent defects from resurfacing during train operation.
Hairline cracks that were discovered during inspection were confirmed to not affect operational safety. Nevertheless, to ensure that there are sufficient trains for commuters, all affected trains were being sent back, one at a time, for rectification. Stringent checks would also be performed regularly to ensure operational safety of all trains. This article was written to clarify that safety was never compromised despite having defects on the trains, and extensive measures were taken to rectify the problem.

In my opinion, the issue was handled systematically by the respective parties, otherwise more time would have been wasted, as well as, inconvenience to the commuters.
The Straits Times webpage interviewed Mr Khaw (2016), in which he said that an independent accessor, TUV Rheinland assured that the trains are operationally safe. The trains can withstand three times the maximum stress during operations, not having to compromise the safety margin. "According to SIM University senior lecturer Park Byung Joon (2016), he stated that the cracks on the train does not compromise safety as long as they are being monitored. An example he had given, was that most people never knew that airplanes also have cracks. Commuters should be assured that stress tests are being conducted and are guaranteed safe for operation.

Additionally, Channel News Asia (2016) suggest that, the matter involving the hairline cracks were handled systematically; In addition, instead of pushing the blame, they took action by taking responsibility and rectified the problem. Such as, extended warranty period for the train parts and that Kawaksaki-Sifang arranged replacement for all 26 bolsters and car bodies. 

The Straits Times (2016) article also attempts to relief the tension in the public by answering one of the key issues raised, Why was the issue not made public earlier?”. Response was, safety was never an issue and responsibility was taken on by the manufacturers; Moreover, there are sufficient trains for the commuters, if the issue was not handled up to satisfaction, only then would the situation be publicized. In this article, many questions were answered by Mr Khaw himself and his intention was clear that he did not want to create public unrest due to this issue.

In conclusion, the respective parties involved in the situation have done well rectifying the problem by addressing the public’s concern, as well as, ensuring sufficient trains for commuters.

References:
Khaw (2016, Aug 17). Cracks on MRT trains: Khaw addresses key issues raised. The Straits times. Retrieved from http://www.straitstimes.com/singapore/transport/cracks-on-mrt-trains-khaw-addresses-key-issues-raised
Khaw (2016, July 12). Minister Khaw Boon Wan: I covered up the news of MRT train return. The Straits times review page. Retrieved from http://statestimesreview.com/2016/07/12/minister-khaw-boon-wan-i-covered-up-the-news-of-mrt-train-return/
Khaw (2016, Aug 16). Khaw: Lessons to be learnt from defective SMRT trains incident. Channel News Asia. Retrieved from http://www.channelnewsasia.com/news/singapore/lessons-to-be-learnt-from/3048928.html
The Straits Times (2016, Sept 10). Hairline cracks found on 11 Sengkang-Punggol LRT trains. The Straits times, Retrieved from http://www.straitstimes.com/singapore/transport/hairline-cracks-found-on-11-lrt-trains
Land Transport Authority (2016, July 6). TRAINS ON THE NORTH-SOUTH AND EAST-WEST LINES SAFE FOR SERVICE. LTA news page. Retrieved from https://www.lta.gov.sg/apps/news/page.aspx?c=2&id=0f8b1220-0289-4bef-99c9b2455f17a66c#_ftn1

Friday 7 October 2016

Email to Dr Moshood

 This email was written with a purpose to schedule a meeting with Dr Moshood; a professor with knowledge in building services, to seek his advice on water tank storage tank.

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Dear Dr. Moshood,

I am Ike Domenden, a first-year SIE (Building Services) student. As I am currently in Brad Blackstone's Effective Communication class, I have been assigned to a group of three including myself and tasked to identify an engineering problem and propose a solution. Following a discussion with Brad, I was told to seek your advice as you hold a great deal of knowledge with regards to Building Services matters.

The engineering problem that our group has come up with is the issue of water disruption in buildings due to cleaning and maintenance works being performed on their respective rooftop water storage tank.

From what we know, water storage tanks have internal partitions to ensure water output is not disrupted when one side is undergoing maintenance works. However, the partition warps over time, losing its watertight integrity. As a result, isolation becomes difficult to perform, and the tanks often have to be completely shut off in order to proceed with cleaning and maintenance works, leading to water disruptions.

To solve this problem, we are currently planning to propose the replacement of said tank into two individual physical tanks to ensure that isolation can be done effectively, so that any works being done on one of the tanks will not affect the overall water output.

Our group would like to consult you and obtain some background information on water storage tanks, so that we can have a better understanding before we prepare our proposal. The main items that we require clarification for are as follows:

1. Does every building have only one domestic water storage tank that serves water to the entire building?

2. Are different materials being used for water tanks? What are the pros and cons of each?

3. Is it better for us to focus on a specific type of building (HDB Flats, Shopping Malls etc.) when working on our proposal?

4. We plan to record an interview with experienced professionals or any relevant authorities, which we have identified as HDB, PUB, BCA and the local Town Councils. Which of these should we request an interview from in order to get a professional opinion on this matter?

We would really appreciate it if you could share your expertise with us regarding domestic water storage tanks. Alternatively, if needed, kindly assist us to direct these questions to the relevant people. Many thanks!

Best regards,
Ike Domenden
Sustainable Infrastructure Engineering
(Building Services)