When additional features are added during a project implementation, what is commonly affected?

Adding additional features during a project implementation typically leads to changes in project duration and cost. This is primarily due to the fact that incorporating new features often requires extra development time, resources, and sometimes even additional personnel. As developers work to integrate these new functionalities, they may need to extend timelines to ensure the quality and functionality of the software is not compromised.

Moreover, there's likely an increased financial investment needed for these additional features. This can stem from various factors, including increased labor costs, potential overtime for the development team, or the necessity to acquire new tools or technologies. This dynamic is a well-recognized concept in project management, often referred to as "scope creep." Scope creep occurs when the initial project parameters expand beyond their original scope without corresponding adjustments to budget and schedules, thus impacting both duration and cost.

Considering the other options, while changes to project scope can influence employee satisfaction levels, future project approvals, and revenue generation, these are generally secondary effects rather than direct impacts. The direct consequences of adding features are predominantly reflected in the adjustment of timelines and budgets.