Anybody know where publications might get this info :
“ For the year through December 2016, Tesla's inventory turnover period was 139 days. “
Tesla production delays raise doubts on its finances - Nikkei Asian Review
Are they just making this up ? Are they counting cars used for service and demos ?
No idea where the reporter gets his numbers, but:
Inventory turnover, for any period, is usually defined as: COGS for the period/Average Inventory for the Period = Inventory Factor; 365 days/Inventory Factor = Inventory Turnover Period.
How to Calculate Inventory Turnover
Using the 2016 10k, COGS of Auto Revenue was $4.75 billion. Beginning of period Finished Goods Inventory was $0.477 billion and end of period was $1.017 billion for an average of $0.766 billion for a factor of about 6.3 or a holding period of ~58 days.
Using Total COGS and Average 2016 of all Inventory (raw materials, WIP. FG & parts), the holding period is 111 days.
For the 1st 3 quarters of 2017, the comparable measures are:
Auto COGS & FG Inventory only: ~85 days
Total COGS & Total Inventory: ~124 days
Looking backwards to 2013, 2014 and 2015:
2015 Auto/FG only: ~57 days; Total COGS/INV ~131 days
2014 Auto/FG only: ~40 days; Total COGS/INV ~102 days
2013 Auto/FG only: ~65 days; Total COGS/INV ~290 days
To summarize (in days of inventory):
......
Auto Only...
Total
3Q17..85.........124
2016...58.........111
2015...57.........131
2014...40.........102
2014...65.........290
(Using quarterly rather than annual periods for average inventory would yield slightly different results.)
Comparisons to other auto manufacturers (Toyota/Mazda etc.) with different business paradigms are inapt; the more relevant issues for investors would seem to be how frequently a company with Tesla's business plan should turnover its inventory and how Inventory factors and turnover periods should change as the company grows?
It would be helpful for analysis if Tesla were to break down its Inventory categories (raw materials, WIP, FG & Parts) in the same granularity as it reports COGS (Auto Sales, Auto Leasing, Energy Generation & Storage, and Services & Other.) Alas, not to be.
Period to period measures are somewhat distorted by the leases/resale/residual guarantees and the SolarCity merger. Tesla's plan to manage cash needed for Operations is to collect payments from Model 3 customers before it has to pay it's material suppliers. This requires high turns for raw material and WIP inventories.
FWIW, FG Inventory includes not just floor models, demos, and service loaners but also pre-owned Teslas traded-in.