The economy's self-correcting mechanism tends to push the unemployment rate back to a specific rate of unemployment. How?

If the economy is facing a recessionary gap, then it results in a) equilibrium output which will be below potential GDP, and b) the economy will have industrial capacity and unsold output, so the inflation will be under control. At the same time, the availability of unemployed workers eager for jobs will reduce wages as well as the cost of production. These lower costs, in turn, stimulate greater production and unemployment will be back on its long run level, i.e., natural rate of unemployment. The same process will work in the opposite direction if the economy is facing inflationary gap.