What does negative Change in Net Working Capital indicated in a company? What is the assumption behind it? I am trying to make a discounted cash flow model of a company that designs products and outsource their manufacturing to foreign companies.

	2018	2019	Forecast Year 1	Forecast 2
Current assets	600,000	700,000	700,000	706,999
Current liabilities	644,000	650,000	750,000	768,880
Working Capital	-44,000	50,000	-50,000	-61,881
Change in NWC		94,000	-100,000	-11,881

Negative change in NWC goes on like this for 10 years