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[[File:Sleeper623.jpg|thumb|right| An LMS sleeping car in the standard maroon livery]]
 
[[File:Sleeper623.jpg|thumb|right| An LMS sleeping car in the standard maroon livery]]
The LMS inherited a wide variety of passenger rolling stock from its constituent companies, and appointed Robert Whyte Reid, and ex-Midland Railway man, as the head of its Carriage department. Reid had already started to introduce more efficient carriage building practises at the Derby Carriage and Wagon Works of the Midland Railway prior to grouping and these same practises were soon introduced to the carriage and wagon works of the former LNWR at Wolverton railway works and the L&YR at Newton Heath.
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The LMS inherited a wide variety of passenger rolling stock from its constituent companies, and appointed Robert Whyte Reid, and ex-Midland Railway man, as the head of its Carriage department.<ref name="Jenkinsonp10">{{Harvnb|Jenkinson|1990|p=10.}}</ref> Reid had already started to introduce more efficient carriage building practises at the [[Derby Carriage and Wagon Works|Derby Carriage and Wagon works]] of the Midland Railway prior to grouping<ref name="Jenkinsonp10"/> and these same practises were soon introduced to the carriage and wagon works of the former LNWR at [[Wolverton railway works|Wolverton]] and the L&YR at Newton Heath.<ref name="Jenkinsonp11">{{Harvnb|Jenkinson|1990|p=11.}}</ref>
  
Most railway carriages were constructed by fitting together component parts which had been roughly machined to larger dimensions than required, which were then cut to the required size and joined together by skilled coachbuilders. Reid's new method involved the use of templates or "Jig (tool)" to mass-produce components to a set pattern and size. Once these had been checked any example of a specific part could be used interchangeably with any other of the same type.  The technique was applied to any item which could be manufactured in large numbers (as there were significant costs in producing the initial jigs) such as doors, ventilators, windows and seats.
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Most railway carriages were constructed by fitting together component parts which had been roughly machined to larger dimensions than required, which were then cut to the required size and joined together by skilled coachbuilders. Reid's new method involved the use of templates or "[[Jig (tool)|jigs]]" to mass-produce components to a set pattern and size. Once these had been checked any example of a specific part could be used interchangeably with any other of the same type.  The technique was applied to any item which could be manufactured in large numbers (as there were significant costs in producing the initial jigs) such as doors, ventilators, windows and seats.<ref name="Jenkinsonp21">{{Harvnb|Jenkinson|1990|p=21.}}</ref>
  
The natural progression was to streamline the assembly process and the company introduced a method known as Progressive Construction. In this process the mass-produced parts were combined into “unit assemblies”, each of which was a major sub-component of the finished carriage such as side panels, carriage ends or the roof. The workshops were organised on the “flow-line” principle, similar to a modern assembly line, and the unit assemblies were taken to workstations, where the precision machining of the mass-produced parts ensured they all fitted accurately into position, building into a complete carriage as the unit moved along the flow line.The technique was already in use in Derby Carriage and Wagon Works prior to grouping, and was adopted in Wolverton during 1925, with Newton Heath following two years later. By using this method, the time taken to construct a typical carriage fell from six weeks to six days and by 1931 Derby and Wolverton were able to handle the entire LMS carriage building workload, and production at Newton Heath ceased.
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The natural progression was to streamline the assembly process and the company introduced a method known as Progressive Construction.<ref name="Jenkinsonp23">{{Harvnb|Jenkinson|1990|p=23.}}</ref> In this process the mass-produced parts were combined into “unit assemblies”, each of which was a major sub-component of the finished carriage such as side panels, carriage ends or the roof. The workshops were organised on the “flow-line” principle, similar to a modern [[assembly line]], and the unit assemblies were taken to workstations, where the precision machining of the mass-produced parts ensured they all fitted accurately into position, building into a complete carriage as the unit moved along the flow line.<ref name="Jenkinsonp23"/> The technique was already in use in [[Derby Carriage and Wagon Works|Derby]] prior to grouping,<ref name="Jenkinsonp21"/> and was adopted in Wolverton during 1925, with Newton Heath following two years later.<ref name="Jenkinsonp23"/> By using this method, the time taken to construct a typical carriage fell from six weeks to six days<ref name="Jenkinsonp23"/> and by 1931 Derby and Wolverton were able to handle the entire LMS carriage building workload, and production at Newton Heath ceased.<ref name="Jenkinsonp24">{{Harvnb|Jenkinson|1990|p=24.}}</ref>
 
* [[Coaches of the London, Midland and Scottish Railway]]
 
* [[Coaches of the London, Midland and Scottish Railway]]
  

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