Revenue Recognition (Tables)

12 Months Ended

Dec. 30, 2022

Revenue from Contract with Customer [Abstract]

Summary of Percent of Revenues

The following table discloses the percent of the Company’s revenue generated from time and materials contracts:

	Fiscal Years
	2022	2021	2020
Engineering & Other Scientific	63%	61%	61%
Environmental and Health	16%	17%	19%
Total time and materials revenues	79%	78%	80%

The following table discloses the percent of the Company’s revenue generated from fixed price contracts:

	Fiscal Years
	2022	2021	2020
Engineering & Other Scientific	20%	21%	19%
Environmental and Health	1%	1%	1%
Total fixed price revenues	21%	22%	20%