a small or insignificant member of a larger organization or system.
15
A flash in the pan
a sudden success that lasts only a short time and is not likely to be repeated
15
A well-oiled machine
someone or something that functions very well or efficiently
15
Go back to the drawing board
To revise something (such as a plan) from the beginning, typically after it has failed / start over
20
Not rocket science
not difficult, easy to implement, easy to understand
15
Light-years ahead
very advanced in its development
15
The nuts and bolts (of something)
If you talk about the nuts and bolts of a subject or an activity, you are referring to the detailed practical aspects of it rather than abstract ideas about it.
15
The brainchild of somebody
a product of one's creative thinking, work, or imagination, such as an idea, plan, invention, or creation.
20
To reinvent the wheel
to waste time doing things that others have already done
15
Museum piece
something that is very old-fashioned and should no longer be used
20
Up and running
If something, especially a system or a machine, is up and running, it is operating normally.
15
Open the door to something
to allow something new to start
15
Take a long, hard look at something
to examine something very carefully in order to improve it in the future
20
The ins and outs
the detailed or complicated facts of something
25
Be jam-packed with something
full of people or things that are pushed closely together: jam-packed with The streets were jam-packed with tourists.
20
Pull the plug
to do something that prevents an activity from continuing, especially by no longer giving money to support it