Is it permissible to charge a designer or a printing press operator for the value of errors resulting from negligence, oversight, lack of experience, or circumstances beyond their control, given that there is an allowable amount of damage for which they are not held accountable?

The designer and the printer are considered a special employee (ajeer khass), whose benefit is estimated by a specific duration. A special employee is not liable for what is damaged under his hand, whether it be work or machinery, except in cases of negligence or transgression, because the machinery in his possession is a trust. Forgetfulness, error, and inattention are not considered transgression. Transgression is defined by what is customarily known among professionals. So, if something is damaged due to routine work, there is no liability. However, if the damage is due to clear transgression (such as intentionally breaking a part), then he is liable. If the employee makes a grave error in his work, he may be liable for the value of the damaged item and not deserve payment, or he may be obligated to repair it.