Costs were collected retrospectively using a combination of an ingredients-based costing methodology, whereby quantities of resources were multiplied by their respective prices to obtain total costs, and a step-down methodology, where joint costs were allocated to activities using allocation factors [ 47].
Then, after obtaining the resources allocated to service stations in every minisystem, the final resources allocated to activities are calculated by the proposed method.
Consequently, when the risk is foreseeably low and can be controlled by suitable RMM, the authors are of the opinion that resources would be better allocated to activities tackling substances associated with high risks.
Time management, self-management with an explicit focus on time in deciding what to do; on how much time to allocate to activities; on how activities can be done more efficiently; and on when the time is right for particular activities.
In his 2011 book Thinking, Fast and Slow, he writes "the often-used phrase 'pay attention' is apt: you dispose of a limited budget of attention that you can allocate to activities".
We then apportioned total personnel costs to each IDSR activity based on the ratio of personnel time allocated to that activity relative to all IDSR activities.
To calculate the cost of each resource per IDSR activity, we multiplied the estimated total IDSR cost of that resource by the proportion of personnel time (or actual amount of resource) allocated to that activity relative to all IDSR activities.
Probability density function of activity durations is dependent on the amount of resource allocated to the activity and varies as this amount changes.
The percentage of FTEs allocated to this activity varied widely, possibly a reflection of the mix and complexities of ongoing activities within each group.
Let U a be the maximum amount of resource available to be allocated to the activity a (a ∈ A), L a be the minimum amount of resource needed to execute the activity a, x = [x a : a ∈ A] T, and J be the amount that represents the resource available to be allocated to all of activities.
