Does This ER Schema Make Sense

here is an updated version

Given the following requirements,

We have three distinct types of workers: receptionists, nurses, and doctors. Any of the workers can be a patient. Each person has a first, last, possibly a middle name, and one or more addresses(city, state, street, number). Can have zero or more email addresses and zero or more phone numbers.

Workers take shifts. A shift has start and end times (military time). Shifts do not overlap and are consecutive. Each worker will thus be assigned to many shifts in that period. 1+ receptionists are assigned to a shift, 2+ nurses, 2+ doctors; one of the doctors is the shift’s triage doctor.

When a patient comes it happens during a particular shift, is admitted by a particular receptionist, is seen by the triage doctor of the shift. The patient may be sent home, prescribed some medication by the triage doctor and sent home, or may stay in the ER, in which case the patient is given a bed and a case doctor (one of the doctors on each shift best qualified for the particular problem of the patient). Each bed is supervised by a single nurse during a shift, but a nurse may supervise many beds, or none at all. The case doctor(s) may prescribe a medication that is administered to the patient by a single nurse in each shift for the duration of the patient taking the medicine. Each medication has a unique name, and for each patient there may be a different dosage and different number of times a day to take it.

Does this ER Schema make sense?

first of all I suggest you to take a look at extended ER ... cause it supports inheritance.when you read that you'll get the idea of what I'm trying to say below:

1- You will have an entity called Person which is the parent entity of Patient and Employee.

2- You'll also apply the inheritance for each employee role so you'll have Employee as the parent entity for Nurse, Doctor and Receptionist.

3- Consider Bed as an entity and revise the ER diagram based on that.

4- I cannot see where is the relationship "The case doctor(s) may prescribe a medication that is administered to the patient by a single nurse in each shift for the duration of the patient taking the medicine" in your ER diagram.

5- check out your diagram does not include any "Chasm Trap" or/and "Fan Trap"

Update:

6- there must be a relation between Shift and Doctor for indicating the triage-doctor not an attribute in Shift.

please let me know when you applied these suggestions or any feedback.