Glossary entry (derived from question below)
German term or phrase:
Rollmasse
English translation:
Rotable inventory, rotable pool
Added to glossary by
Barbara L Pavlik
Jan 28, 2017 11:50
7 yrs ago
3 viewers *
German term
Rollmasse
German to English
Tech/Engineering
Transport / Transportation / Shipping
Railcar Maintenance
Das EVU wird deshalb zusammen mit der Lieferung der Fahrzeuge ein Ersatzteilpaket beschaffen. Dieses dient dazu, bei Bauteilausfällen oder Unfällen eine kurzfristige Verfügbarkeit des betroffenen Fahrzeugs wieder herzustellen. Darüber hinaus dienen die Komponenten des Ersatzteilpakets als ***Rollmasse***, die im Rahmen der Revisionen des Instandhaltungsprogramms durchgetauscht und außerhalb des Fahrzeugs aufgearbeitet werden.
Proposed translations
(English)
3 +3 | Rotable inventory, rotable pool |
phillee
![]() |
4 | rotating spare (part) |
Johannes Gleim
![]() |
References
criticality of spare parts |
Johannes Gleim
![]() |
Proposed translations
+3
5 hrs
Selected
Rotable inventory, rotable pool
Stock of repairable parts used for repair or routine maintenance
Peer comment(s):
agree |
Wendy Streitparth
: Ah! Now that really sounds plausible.
8 mins
|
agree |
polyglot45
: well, since this is more or less what I said......
39 mins
|
agree |
Kim Metzger
: Or rotable spares inventory https://www.pomsmeetings.org/confpapers/004/004-0250.pdf
2 hrs
|
4 KudoZ points awarded for this answer.
Comment: "Thank you!"
6 hrs
rotating spare (part)
The term rolling stock originally referred to any vehicles that move on a railway. It has since expanded to include the wheeled vehicles used by businesses on roadways.[1][2][3] It usually includes both powered and unpowered vehicles, for example locomotives, railroad cars, coaches, and wagons.[4][5][6][7]
https://en.wikipedia.org/wiki/Rolling_stock
Highest value of this index involves lower value of capital frozen in inventory. The type of stock is also essential since in the case of safety stock warehouse the value of rotation can be very low or even at zero level. This might mainly concern those items which are outdated. However, not all the stocks with lower rotation rate will be redundant. Maintaining stock, despite low rotation, can be justified by the need for safety stock which is supposed to ensure immediate customer service [8.].
https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd...
Another type of spare part is the 'rotating spare part'. An example of this is a racing car with three engines that are constantly being ‘rotated’ though the car. In this instance the ‘spare part’ are assets that are installed (in turn) and therefore are subject to depreciation just like any other depreciating asset.
https://books.google.de/books?id=eCcEhKsrw14C&pg=PT142&lpg=P...
1. There are two cases: a single unit and a couple of the same units in the same power plant. …
If there are two or more identical units in power plant, at least one spare motor of every type is kept, even for 3 x 50%, 6 x 20%, etc. in the warehouse. In all these cases, the failed motor is replaced with a spare one, repaired immediately and given back either in the warehouse, or on the site.
:
2. In one case for a 2 x 100% drive, spare motors were not originally supplied. A spare motor was bought and installed in parallel with the repair of a failed motor, and the repaired motor has subsequently been used as the rotating spare.
https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd...
https://en.wikipedia.org/wiki/Rolling_stock
Highest value of this index involves lower value of capital frozen in inventory. The type of stock is also essential since in the case of safety stock warehouse the value of rotation can be very low or even at zero level. This might mainly concern those items which are outdated. However, not all the stocks with lower rotation rate will be redundant. Maintaining stock, despite low rotation, can be justified by the need for safety stock which is supposed to ensure immediate customer service [8.].
https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd...
Another type of spare part is the 'rotating spare part'. An example of this is a racing car with three engines that are constantly being ‘rotated’ though the car. In this instance the ‘spare part’ are assets that are installed (in turn) and therefore are subject to depreciation just like any other depreciating asset.
https://books.google.de/books?id=eCcEhKsrw14C&pg=PT142&lpg=P...
1. There are two cases: a single unit and a couple of the same units in the same power plant. …
If there are two or more identical units in power plant, at least one spare motor of every type is kept, even for 3 x 50%, 6 x 20%, etc. in the warehouse. In all these cases, the failed motor is replaced with a spare one, repaired immediately and given back either in the warehouse, or on the site.
:
2. In one case for a 2 x 100% drive, spare motors were not originally supplied. A spare motor was bought and installed in parallel with the repair of a failed motor, and the repaired motor has subsequently been used as the rotating spare.
https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd...
Reference comments
6 hrs
Reference:
criticality of spare parts
A cross-functional team composed of employees from Operations, Maintenance, Engineering, Materials Management and Safety conducts the first phase of a criticality analysis. The analysis looks at the impact equipment failure would have on customer orders, time to production disruption, employee safety, environment, the ability to isolate the failed equipment, equipment history of Mean-Time-Between-Failures (MTBF), PM/PdM history and the overall predictability of failure. Each of these factors are reviewed and given a weighted score between zero and 100 that converts into a part criticality ranking as shown in the criticality index below.
The scores are divided into categories which indicate the severity of failure from catastrophic to significant or insignificant. A rating of catastrophic would indicate a part or assembly is usually an item that is held in inventory; it is a critical part for a critical asset and has been identified as a safety compliance issue if it fails. A rating of significant would indicate the part is for a non-critical asset and would probably fall into the category of a normal MRO consumable item. The insignificant rating would indicate that the part was a non-critical item and not a safety concern if it failed.
The second phase of the criticality analysis is to determine if the item will be held on site as a part of the MRO inventory or designated as a non-stock, order on demand critical spare. Parts held in the MRO inventory are an investment to ensure production is not interrupted and safety of the employees and environment are not compromised. These parts that are purchased and held as part of the inventory have an ongoing cost associated with their management. A typical item held in inventory, whether critical or non-critical, has a handling or annual carrying cost of 17 to 25% of the cost of the item in the average MRO inventory. In five years the associated carrying cost has doubled the expense of the spare part and if the item is a rotating spare that has not been under a preventive maintenance program, the part could fail when put in service or not provide for the expected service life of a new part.
A risk analysis that evaluates the lead time from the time the order is placed with the supplier until receipt of the item on site is also a factor that affects the decision to stock the part as part of the inventory. The reliability of the supplier to meet the expected lead time for the part should also be a part of the risk analysis. Suppliers providing critical spare parts should go through a certification process and be under contract to mitigate unexpected lost production time and delayed deliveries. Some parts can only be purchased from a single supplier. If parts availability is limited to a single supplier, the question needs to be asked, “What is the financial status of this supplier?” If there is a possibility that the supplier could go out of business due to a stressed economic environment, the decision might be to buy what is available and hold the parts in inventory to mitigate that risk. If parts are obsolete or the manufacturer is no longer producing these specific parts, the decision might again be to purchase the available parts and hold them in inventory as a hedge against possible equipment failure.
https://www.lce.com/How-do-you-determine-which-repair-parts-...
The scores are divided into categories which indicate the severity of failure from catastrophic to significant or insignificant. A rating of catastrophic would indicate a part or assembly is usually an item that is held in inventory; it is a critical part for a critical asset and has been identified as a safety compliance issue if it fails. A rating of significant would indicate the part is for a non-critical asset and would probably fall into the category of a normal MRO consumable item. The insignificant rating would indicate that the part was a non-critical item and not a safety concern if it failed.
The second phase of the criticality analysis is to determine if the item will be held on site as a part of the MRO inventory or designated as a non-stock, order on demand critical spare. Parts held in the MRO inventory are an investment to ensure production is not interrupted and safety of the employees and environment are not compromised. These parts that are purchased and held as part of the inventory have an ongoing cost associated with their management. A typical item held in inventory, whether critical or non-critical, has a handling or annual carrying cost of 17 to 25% of the cost of the item in the average MRO inventory. In five years the associated carrying cost has doubled the expense of the spare part and if the item is a rotating spare that has not been under a preventive maintenance program, the part could fail when put in service or not provide for the expected service life of a new part.
A risk analysis that evaluates the lead time from the time the order is placed with the supplier until receipt of the item on site is also a factor that affects the decision to stock the part as part of the inventory. The reliability of the supplier to meet the expected lead time for the part should also be a part of the risk analysis. Suppliers providing critical spare parts should go through a certification process and be under contract to mitigate unexpected lost production time and delayed deliveries. Some parts can only be purchased from a single supplier. If parts availability is limited to a single supplier, the question needs to be asked, “What is the financial status of this supplier?” If there is a possibility that the supplier could go out of business due to a stressed economic environment, the decision might be to buy what is available and hold the parts in inventory to mitigate that risk. If parts are obsolete or the manufacturer is no longer producing these specific parts, the decision might again be to purchase the available parts and hold them in inventory as a hedge against possible equipment failure.
https://www.lce.com/How-do-you-determine-which-repair-parts-...
Discussion
Fuses cannot be repaired, but auxiliary means for switchgears like lamps or relays, busbars or bolts and screws.
To be clearer: if a train has a broken component that has to be dismanteled for fixing- which takes time - and then refitted, it is not as convenient as when they have floating stocks enabling the damaged part to be removed replaced, then repaired and set aside for use later on another vehicle in similar circumstances