Which of the following maintenance types is generally more unpredictable in cost?

Reactive maintenance is characterized by responding to equipment failures or unexpected issues as they arise, rather than following a predetermined schedule. This unpredictability in cost stems from several factors, including the variable nature of equipment breakdowns, the urgency of repairs needed, and the potential for unforeseen complications during the maintenance process. Unlike routine maintenance, which involves regular checks and predictable expenses, or scheduled maintenance, where costs are often estimated and planned ahead, reactive maintenance can lead to significant fluctuations in budget due to its dependence on the variables of failure.

As a result, organizations that rely heavily on reactive maintenance may find themselves facing unexpected financial burdens, as they have little control over when equipment will fail or the extent of the repairs required. This unpredictability inhibits accurate budgeting and financial planning compared to other maintenance strategies.