look forward to是否等于expect to so sth

expect to do sth
look forward to
都有期待去做什么的意思
但是expect to do sth
还有"预期去做""需要去做"的意思
例句:
Designers can expect to cycle through Steps 3 through 5 several times until the requirements are stable。
设计师可能需要从步骤3到步骤5循环多次,直到需求变得稳定。