What development created the initial production bottleneck that the Spinning Jenny addressed?
Answer
John Kay's introduction of the flying shuttle
The flying shuttle, introduced in 1733, allowed weavers to process yarn much faster than spinners could produce it, creating an imbalance where yarn demand outstripped the supply capacity of the domestic spinning industry.

Related Questions
What development created the initial production bottleneck that the Spinning Jenny addressed?Who is credited with inventing the Spinning Jenny?According to popular account, what observation inspired James Hargreaves to conceive the Spinning Jenny?Approximately how many spindles did the initial versions of the Spinning Jenny typically handle?In the context of the Spinning Jenny's mechanics, what is a roving?For which purpose was the yarn produced by the Spinning Jenny best suited?How did the yarn produced by the Spinning Jenny compare in strength to the yarn from Richard Arkwright’s Water Frame?In what year did James Hargreaves secure the patent for the Spinning Jenny?Why was the enforcement of Hargreaves' patent on the Spinning Jenny difficult?Which machine combined the multi-spindle operation of the Jenny with the stronger twist capabilities of the Water Frame?What fundamental principle, established by the Spinning Jenny, drove the Industrial Revolution forward in spinning?