Decision Support Methodology Based on Covering-Based Interval-Valued Pythagorean Fuzzy Rough Set Model and Its Application to Hospital Open-Source EHRs System Selection

Algorithm 1

Algorithm for MADM with CIVPFRS.

	Input IVPFCAS ;
	Output Ranking results of all alternatives;
	Step 1. Construct IVPF-PIS and IVPF-NIS by formulas (25) and (26);
	Step 2. Calculate the distances and by using formulas (27) and (28), respectively.
	Step 3. Calculating the upper and lower approximations , , , , , , according to formulas (12) and (13).
	Step 4. Determine risk preference threshold and calculate those ranking functions and by using formulas (31) and (32).
	Step 5. Calculate the ranking function according to formula (34).
	Step 6. List the ranking results of all alternatives.