Update Case_study.md

Doc/Case_study.md

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 At the [BFI National Archive](https://www.bfi.org.uk/bfi-national-archive) we have been encoding DPX sequences to FFV1 Matroska since late 2019. In that time our RAWcooked workflow has evolved with the development of RAWcooked, DPX resolutions and flavours and changes in our encoding project priorities.  Today we have a fairly hands-off automated workflow which handles 2K, 4K, RGB, Luma, DPX and Tiff image sequences.  This workflow is built on some of the flags developed by the Media Area and written in a mix of BASH shell scripts and Python3 scripts and is available to view from the [BFI Data & Digital Preservation GitHub](https://github.com/bfidatadigipres/dpx_encoding). In addition to our RAWcooked use I will also consider how we use other Media Area tools alongside RAWcooked to complete necessary stages of this workflow.  Our encoding processes do not include any alpha channels or audio file processing, but RAWcooked is capable of muxing both into the completed FFV1 Matroska dependent upon your licence.
 
 This case study is broken into the following sections:  
-* [Server configuration and throughput](#server_config)
+* [Server configuration](#server_config)
+* [One year study of throughput](#findings)
 * [Image sequence assessment](#assessment)  
 * [Muxing the image sequence](#muxing)  
 * [Muxing log assessments](#log_assessment)  
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 When encoding 2K RGB we generally reach between 3 and 10 frames per second (fps) from FFmpeg encoding on the lower machine. Now running 4K scans it's generally 1 fps or less. These figures can be impacted by the quantity of parellel processes running at any one time.
 
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+# <a name="findings">One year study of throughput</a>
+
 Between Febraury 2023 and February 2024 the BFI encoded 1020 DPX sequences to FFV1 Matroska. A Python script was written to capture certain data about these muxed files, including sequence pixel size, colourspace, bits, and byte size of the image sequence and completed FFV1 Matroska. We captured the following data:
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 * 140 of the 1020 were 2K or smaller / 880 4K or larger
 * 222 were Luma Y / 798 were RGB
 * 143 were 10-bit / 279 12-bit / 598 16-bit